Navigation

  • Skip to Content
NTNU Home

ntnu.edu

  • Studies
    • Master's programmes in English
    • For exchange students
    • PhD opportunities
    • All programmes of study
    • Courses
    • Financing
    • Language requirements
    • Application process
    • Academic calendar
    • FAQ
  • Research and innovation
    • NTNU research
    • Research excellence
    • Strategic research areas
    • Innovation resources
    • PhD opportunities
  • Life and housing
    • Student in Trondheim
    • Student in Gjøvik
    • Student in Ålesund
    • For researchers
    • Life and housing
  • About NTNU
    • Contact us
    • Faculties and departments
    • Libraries
    • International researcher support
    • Vacancies
    • About NTNU
    • Maps
  1. Employees

Språkvelger

Norsk

Ragnvald Mathiesen

Ragnvald Mathiesen

Professor
Department of Physics

ragnvald.mathiesen@ntnu.no
+4773593362 Realfagbygget, D4-157, Gløshaugen, Høgskoleringen 5
Publications Teaching Media

Publications

  • Chronological
  • By category
  • See all publications in Cristin

2021

  • Wang, Yeqing; Gao, Jianrong; Chao, Paul; Muyanja, Nancy S.; Mathiesen, Ragnvald; Shahani, Ashwin J.. (2021) In-situ evidence for impurity-induced formation of eutectic colonies in an interdendritic liquid. Materials Letters. volum 292.
    Academic article
  • Xu, Yijiang; Deng, Yun; Casari, Daniele; Mathiesen, Ragnvald; Liu, Xiangfa; Li, Yanjun. (2021) Growth kinetics of primary Si particles in hypereutectic Al-Si alloys under the influence of P inoculation: Experiments and modelling. Journal of Alloys and Compounds. volum 854.
    Academic article
  • Zha, Min; Zhang, Hongmin; Jia, Hailong; Gao, Yipeng; Jin, Shenbao; Sha, Gang; Bjørge, Ruben; Mathiesen, Ragnvald; Roven, Hans Jørgen; Wang, Hui-Yuan; Li, Yanjun. (2021) Prominent role of multi-scale microstructural heterogeneities on superplastic deformation of a high solid solution Al–7Mg alloy. International journal of plasticity. volum 146.
    Academic article

2020

  • Feng, Shikang; Liotti, Enzo; Lui, Andrew; Wilson, Matthew D.; Connolley, Thomas; Mathiesen, Ragnvald; Grant, P. S.. (2020) In-situ X-ray radiography of primary Fe-rich intermetallic compound formation. Acta Materialia. volum 196.
    Academic article
  • Ormstrup, Jeppe; Østergaard, Emil V.; Detlefs, Carsten; Mathiesen, Ragnvald; Yildirim, Can; Kutsal, Mustafacan; Cook, Philip K.; Watier, Yves; Cosculluela, Carlos; Simons, Hugh. (2020) Imaging microstructural dynamics and strain fields in electro-active materials in situ with dark field x-ray microscopy. Review of Scientific Instruments. volum 91 (6).
    Academic article
  • Xu, Yijiang; Deng, Yun; Casari, Daniele; Mathiesen, Ragnvald; Li, Yanjun. (2020) In-situ X-radiographic study of nucleation and growth behaviour of primary silicon particles during solidification of a hypereutectic Al-Si alloy. Journal of Alloys and Compounds. volum 832.
    Academic article
  • Xu, Yijiang; Deng, Yun; Casari, Daniele; Mathiesen, Ragnvald; Liu, Xiangfa; Li, Yanjun. (2020) Revealing the nucleation kinetics of primary Si particles in hypereutectic Al-Si alloys under the influence of P inoculation. Journal of Materials Science. volum 55 (32).
    Academic article

2019

  • Falch, Ken Vidar; Detlefs, Carsten; Christensen, Magnus Sebastian; Paganin, David; Mathiesen, Ragnvald. (2019) Experimental investigation of Gaussian random phase screen model for x-ray diffusers. Optics Express. volum 27 (15).
    Academic article
  • Mirihanage, Wajira; Falch, Ken Vidar; Casari, Daniele; McFadden, Shaun; Browne, David J.; Snigireva, I.; Snigirev, Anatoly; Li, Yanjun; Mathiesen, Ragnvald. (2019) Non-steady 3D dendrite tip growth under diffusive and weakly convective conditions. Materialia. volum 5.
    Academic article
  • Olofsson, Jakob; Salomonsson, Kent; Dahle, Arne K.; Mathiesen, Ragnvald. (2019) Three-dimensional study of nodule clustering and heterogeneous strain localization for tailored material properties in ductile iron. IOP Conference Series: Materials Science and Engineering. volum 529 (1).
    Academic article
  • Xu, Yijiang; Casari, Daniele; Mathiesen, Ragnvald; Li, Yanjun. (2019) Revealing the Heterogeneous Nucleation and Growth Behaviour of Grains in Inoculated Aluminium Alloys During Solidification. The Minerals, Metals & Materials Series.
    Academic article
  • Zhang, Qiuyuan; Polikarpov, Maxim; Nataliya, Klimova; Larsen, Helge Bøvik; Mathiesen, Ragnvald; Emerich, Hermann; Thorkildsen, Gunnar; Snigireva, Irina; Snigirev, Anatoly. (2019) Investigation of glitches induced by single-crystal diamond compound refractive lenses based on crystal orientation. AIP Conference Proceedings. volum 2054 (1).
    Academic article

2018

  • Aucott, Lee; Dong, Hongbiao; Mirihanage, Wajira; Atwood, Robert; Kidess, Anton; Gao, Shian; Wen, Shuwen; Marsden, John; Feng, Shuo; Tong, Mingming; Connolley, Thomas; Drakopoulos, Michael; Kleijn, Chris R.; Richardson, Ian M.; Browne, David J.; Mathiesen, Ragnvald; Atkinson, Helen V.. (2018) Revealing internal flow behaviour in arc welding and additive manufacturing of metals. Nature Communications. volum 9.
    Academic article
  • Falch, Ken Vidar; Detlefs, Carsten; Snigirev, Anatoly; Mathiesen, Ragnvald. (2018) Analytical transmission cross-coefficients for pink beam X-ray microscopy based on compound refractive lenses. Ultramicroscopy. volum 184 (B).
    Academic article
  • Falch, Ken Vidar; Lyubormiskiy, Mikhail; Casari, Daniele; Snigirev, Anatoly; Snigireva, Irina; Detlefs, Carsten; Di Michiel, Marco; Lyatun, Ivan; Mathiesen, Ragnvald. (2018) Zernike phase contrast in high-energy x-ray transmission microscopy based on refractive optics. Ultramicroscopy. volum 184 (A).
    Academic article
  • Xu, Yijiang; Casari, Daniele; Mathiesen, Ragnvald; Li, Yanjun. (2018) Revealing the heterogeneous nucleation behavior of equiaxed grains of inoculated Al alloys during directional solidification. Acta Materialia. volum 149.
    Academic article
  • Zha, Min; Yu, Zhi-Yuan; Qian, Feng; Wang, Huiyuan; Li, Yanjun; Mathiesen, Ragnvald; Roven, Hans Jørgen. (2018) Achieving dispersed fine soft Bi particles and grain refinement in a hypermonotectic Al–Bi alloy by severe plastic deformation and annealing. Scripta Materialia. volum 155.
    Academic article
  • Zhang, Qiuyuan; Polikarpov, Maxim; Klimova, Nataliya; Larsen, Helge Bøvik; Mathiesen, Ragnvald; Emerich, Hermann; Thorkildsen, Gunnar; Snigireva, Irina; Snigirev, Anatoly. (2018) Investigation of `glitches' in the energy spectrum induced by single-crystal diamond compound X-ray refractive lenses. Journal of Synchrotron Radiation. volum 26.
    Academic article

2017

  • Bjurenstedt, Anton; Casari, Daniele; Seifeddine, Salem; Mathiesen, Ragnvald; Dahle, Arne Kristian. (2017) In-situ study of morphology and growth of primary alpha-Al(FeMnCr)Si intermetallics in an Al-Si alloy. Acta Materialia. volum 130.
    Academic article
  • Browne, David J.; García-Moreno, Francisco; Nguyen-Thi, Henri; Zimmermann, Gerhard; Kargl, Florian; Mathiesen, Ragnvald; Griesche, Axel; Minster, Olivier. (2017) Overview of in situ X-Ray studies of light alloy solidification in microgravity. The Minerals, Metals & Materials Series. volum Part XII.
    Academic article
  • Casari, Daniele; Mirihanage, Wajira; Falch, Ken Vidar; Ringdalen, Inga Gudem; Friis, Jesper; Schmid-Fetzer, Rainer; Zhao, Dongdong; Li, Yanjun; Sillekens, Wim H.; Mathiesen, Ragnvald. (2017) Morphological transition of α-Mg dendrites during near-isothermal solidification of a Mg-Nd-Gd-Zn-Zr casting alloy. The Minerals, Metals & Materials Series. volum Part F8.
    Academic article
  • Falch, Ken Vidar; Casari, Daniele; Di Michiel, Marco; Detlefs, Carsten; Snigirev, Anatoly; Snigireva, Irina; Honkimäki, Veijo; Mathiesen, Ragnvald. (2017) In situ hard X-ray transmission microscopy for material science. Journal of Materials Science. volum 52 (6).
    Academic article
  • Jia, Hailong; Bjørge, Ruben; Marthinsen, Knut; Mathiesen, Ragnvald; Li, Yanjun. (2017) Soft particles assisted grain refinement and strengthening of an Al-Bi-Zn alloy subjected to ECAP. Materials Science & Engineering: A. volum 703.
    Academic article
  • Xu, Yijiang; Casari, Daniele; Du, Qiang; Mathiesen, Ragnvald; Arnberg, Lars; Li, Yanjun. (2017) Heterogeneous nucleation and grain growth of inoculated aluminium alloys: An integrated study by in-situ X-radiography and numerical modelling. Acta Materialia. volum 140.
    Academic article

2016

  • Casari, Daniele; Mirihanage, Wajira; Falch, Ken Vidar; Ringdalen, Inga Gudem; Friis, Jesper; Schmid-Fetzer, Rainer; Zhao, Dongdong; Li, Yanjun; Sillekens, Wim H.; Mathiesen, Ragnvald. (2016) α-Mg primary phase formation and dendritic morphology transition in solidification of a Mg-Nd-Gd-Zn-Zr casting alloy. Acta Materialia. volum 116.
    Academic article
  • Falch, Ken Vidar; Detlefs, Carsten; Di Michiel, Marco; Snigireva, Irina; Snigirev, Anatoly; Mathiesen, Ragnvald. (2016) Correcting lateral chromatic aberrations in non-monochromatic X-ray microscopy. Applied Physics Letters. volum 109 (5).
    Academic article
  • Mathiesen, Ragnvald. (2016) Det europeiske superrøntgenanlegget ESRF under oppgradering. Fra Fysikkens Verden. volum 78.
    Popular scientific article
  • Murphy, A.G.; Browne, DJ; Houltz, Y; Mathiesen, Ragnvald. (2016) In situ X-ray observations of gas porosity interactions with dendritic microstructures during solidification of Al-based alloys. IOP Conference Series: Materials Science and Engineering. volum 117 (1).
    Academic article
  • Murphy, Andrew G.; Mathiesen, Ragnvald; Houltz, Ylva; Li, J.; Lockowandt, C; Henriksson, K; Melville, N; Browne, David J.. (2016) Direct observation of spatially isothermal equiaxed solidification of an Al–Cu alloy in microgravity onboard the MASER13 sounding rocket. Journal of Crystal Growth. volum 454.
    Academic article
  • Murphy, Andrew G; Mathiesen, Ragnvald; Houltz, Ylva; Li, J; Lockowandt, C; Henriksson, K.J.; Zimmermann, Gerhard; Browne, David J.; Melville, N. (2016) XRMON-SOL: Isothermal equiaxed solidification of a grain refined Al-20 wt%Cu alloy. Journal of Crystal Growth. volum 440.
    Academic article
  • Sillekens, W.H.; Casari, Daniele; Mirihanage, Wajira U.; Terzi, S; Mathiesen, Ragnvald; Salvo, L; Daudin, R; LHUISSIER, P; Guo, E; Lee, P. D.. (2016) The Use of In Situ X-ray Imaging Methods in the Research and Development of Magnesium-Based Grain-Refined and Nanocomposite Materials. JOM. volum 68 (12).
    Academic article

2015

  • Li, Yanjun; Xu, Yijiang; Du, Qiang; Arnberg, Lars; Mathiesen, Ragnvald. (2015) Numerical modelling and in-situ radiographic study of the grain nucleation and growth of inoculated aluminum alloys. IOP Conference Series: Materials Science and Engineering. volum 84 (1).
    Academic article
  • Mirihanage, Wajira; Di Michiel, Marco; Mathiesen, Ragnvald. (2015) Ultra-fast in-situ X-ray studies of evolving columnar dendrites in solidifying steel weld pools. IOP Conference Series: Materials Science and Engineering. volum 84 (1).
    Academic article
  • Mo, Frode; Mathiesen, Ragnvald; Beukes, Jon Are; Vu, Khanh Minh. (2015) Rochelle salt - A structural reinvestigation with improved tools. I. the high-temperature paraelectric phase at 308 - K. IUCrJ. volum 2 (1).
    Academic article
  • Murphy, A. G.; Mirihanage, Wajira; Browne, DJ; Mathiesen, Ragnvald. (2015) Equiaxed dendritic solidification and grain refiner potency characterised through in situ X-radiography. Acta Materialia. volum 95.
    Academic article
  • Reiten, Andreas; Chernyshov, Dmitry; Mathiesen, Ragnvald. (2015) Nebula: Reconstruction and visualization of scattering data in reciprocal space. Journal of Applied Crystallography. volum 48.
    Academic article
  • Zha, Min; Li, Yanjun; Mathiesen, Ragnvald; Bjørge, Ruben; Roven, Hans Jørgen. (2015) High ductility bulk nanostructured Al-Mg binary alloy processed by equal channel angular pressing and inter-pass annealing. Scripta Materialia. volum 105.
    Academic article
  • Zha, Min; Li, Yanjun; Mathiesen, Ragnvald; Bjørge, Ruben; Roven, Hans Jørgen. (2015) Microstructure evolution and mechanical behavior of a binary Al-7Mg alloy processed by equal-channel angular pressing. Acta Materialia. volum 84.
    Academic article

2014

  • Høydalsvik, Kristin; Fløystad, Jostein Bø; Zhao, Tiejun; Esmaeili, Morteza; Diaz, Ana; Andreasen, Jens Wenzel; Mathiesen, Ragnvald; Rønning, Magnus; Breiby, Dag Werner. (2014) In situ X-ray ptychography imaging of high-temperature CO2 acceptor particle agglomerates. Applied Physics Letters. volum 104 (24).
    Academic article
  • Liotti, E; Lui, A; Vincent, R.; Kumar, S; Guo, Z; Connolley, T; Dolbnya, I.P.; Hart, M; Arnberg, Lars; Mathiesen, Ragnvald; Grant, P. S.. (2014) A synchrotron X-ray radiography study of dendrite fragmentation induced by a pulsed electromagnetic field in an Al-15Cu alloy. Acta Materialia. volum 70.
    Academic article
  • Mirihanage, Wajira; Di Michel, Marco; Reiten, Andreas; Arnberg, Lars; Dong, Hongbiao; Mathiesen, Ragnvald. (2014) Time-resolved X-ray diffraction studies of solidification microstructure evolution in welding. Acta Materialia. volum 68.
    Academic article
  • Mirihanage, Wajira; Falch, Ken Vidar; Snigireva, Irina; Snigirev, A; Li, Yanjun; Arnberg, Lars; Mathiesen, Ragnvald. (2014) Retrieval of three-dimensional spatial information from fast in situ two-dimensional synchrotron radiography of solidification microstructure evolution. Acta Materialia. volum 81.
    Academic article
  • Nguyen-Thi, Henri; Reinhart, Guillaume; Salloum-Abou-Jaoudé, Georges; Browne, David; Murphy, Anthony G.; Houltz, Ylva; Li, J.; Voss, Daniela H.; Verga, Antonio; Mathiesen, Ragnvald; Zimmermann, Gerhard. (2014) XRMON-GF experiments devoted to the in situ X-ray radiographic observation of growth process in microgravity conditions. Microgravity, science and technology. volum 26 (1).
    Academic article
  • Salloum-Abou-Jaoude, G; Nguyen-Thi, H; Reinhart, G; Mathiesen, Ragnvald; Zimmermann, G; Voss, D. (2014) A synchrotron X-ray radiography study of dendrite fragmentation induced by a pulsed electromagnetic field in an Al–15Cu alloy. Materials Science Forum. volum 790-791.
    Academic article
  • Salloum-Abou-Jaoudé, Georges; Nguyen-Thi, Henri; Reinhart, Guillaume; Mathiesen, Ragnvald; Zimmermann, Gerhard; Voss, Daniela H.. (2014) Characterization of Motion of Dendrite Fragment by X-Ray Radiography on Earth and under Microgravity Environment. Materials Science Forum. volum 790-791.
    Academic article
  • Zha, Min; Li, Yanjun; Mathiesen, Ragnvald; Baumgart, Christine; Roven, Hans Jørgen. (2014) Influence on Mg content, grain size and strain rate on mechanical properties and DSA behaviour of Al-Mg alloys processed by ECAP and annealing. Materials Science Forum. volum 794-796.
    Academic article
  • Zha, Min; Li, Yanjun; Mathiesen, Ragnvald; Bjørge, Ruben; Roven, Hans Jørgen. (2014) Achieve high ductility and strength in an Al-Mg alloy by severe plastic deformation combined with inter-pass annealing. Materials Science & Engineering: A. volum 598.
    Academic article
  • Zha, Min; Li, Yanjun; Mathiesen, Ragnvald; Bjørge, Ruben; Roven, Hans Jørgen. (2014) Microstructure, hardness evolution and thermal stability of binary Al-7Mg alloy processed by ECAP with intermediate annealing. Transactions of Nonferrous Metals Society of China. volum 24 (7).
    Academic article
  • Zha, Min; Li, Yanjun; Mathiesen, Ragnvald; Roven, Hans. (2014) Dispersion of soft Bi particles and grain refinement of matrix in an Al-Bi alloy by equal channel angular pressing. Journal of Alloys and Compounds. volum 605.
    Letter to the editor

2013

  • Brataas, Arne; Mathiesen, Ragnvald; Grande, Tor; Roven, Hans Jørgen; Grepstad, Jostein; Echtermeyer, Andreas; Johnsen, Roy; Krøkje, Åse. (2013) Enabling technologies at NTNU; materials science and engineering. 2013.
    Report
  • Liotti, E; Lui, A; Vincent, R.; Kumar, S.; Guo, Z; Connolley, T; Hart, M; Arnberg, Lars; Mathiesen, Ragnvald; Grant, P.S.. (2013) A Synchrotron X-ray Radiography Investigation of Induced Dendrite Fragmentation in Al-15wt%Cu. Materials Science Forum. volum 765.
    Academic article
  • Murphy, A. G.; Browne, DJ; Mirihanage, Wajira; Mathiesen, Ragnvald. (2013) Combined in situ X-ray radiographic observations and post-solidification metallographic characterisation of eutectic transformations in Al-Cu alloy systems. Acta Materialia. volum 61 (12).
    Academic article
  • Nguyen-Thi, H; Reinhart, G; Abou Jaoude, G.S.; Mathiesen, Ragnvald; Zimmermann, Gerhard; Houltz, Y; Voss, D; Verga, A; Browne, DJ; Murphy, A. G.. (2013) XRMON-GF: A novel facility for solidification of metallic alloys with in situ and time-resolved X-ray radiographic characterization in microgravity conditions. Journal of Crystal Growth. volum 374.
    Academic article
  • Zha, Min; Li, Yanjun; Mathiesen, Ragnvald; Bjørge, Ruben; Roven, Hans Jørgen. (2013) Annealing response of binary Al-7Mg alloy deformed by equal channel angular pressing. Materials Science & Engineering: A. volum 586.
    Academic article

2012

  • Mathiesen, Ragnvald; Arnberg, Lars; Nguyen-Thi, H; Billia, B. (2012) In situ X-ray video microscopy as a tool in solidification science. JOM. volum 64 (1).
    Academic article
  • Mirihanage, Wajira; Arnberg, Lars; Mathiesen, Ragnvald. (2012) In-situ observation of transient columnar dendrite growth in the presence of thermo-solutal convection. IOP Conference Series: Materials Science and Engineering. volum 33.
    Academic article
  • Nguyen-Thi, H; Salvo, L; Mathiesen, Ragnvald; Arnberg, Lars; Billia, B; Suery, M; Reinhart, G. (2012) On the interest of synchrotron X-ray imaging for the study of solidification in metallic alloys. Comptes rendus. Physique. volum 13 (3).
    Academic article

2011

  • Anawati, Ms; Diplas, Spyridon; Holme, Børge; Solberg, Jan Ketil; Mathiesen, Ragnvald; Walmsley, John; Nisancioglu, Kemal. (2011) Surface Characterization of Heat Treated AlPbCu Model Alloys. Journal of the Electrochemical Society. volum 158 (6).
    Academic article
  • Mathiesen, Ragnvald; Arnberg, Lars; Li, Yanjun; Meier, Vivienne; Schaffer, Paul; Snigireva, Irina; Snigirev, Anatoly; Dahle, Arne Kristian. (2011) X-Ray Videomicroscopy Studies of Eutectic Al-Si Solidification in Al-Si-Cu. Metallurgical and Materials Transactions A. volum 42A (1).
    Academic article
  • Nguyen-Thi, H; Bogno, A; Reinhart, G; Billia, B; Mathiesen, Ragnvald; Zimmermann, Gerhard; Houltz, Y; Loth, K; Voss, D; Verga, A; de Pascale, F. (2011) Investigation of gravity effects on solidification of binary alloys with in situ X-ray radiography on earth and in microgravity environment. Journal of Physics: Conference Series (JPCS). volum 327 (012012).
    Academic article
  • Rakete, Christoph; Baumbach, C; Goldschmidt, A; Samberg, D; Schroer, C.G.; Breede, F; Stenzel, C; Zimmermann, Gerhard; Pickmann, C; Houltz, Y; Lockowandt, C; Svenonius, O; Wiklund, P; Mathiesen, Ragnvald. (2011) Compact x-ray microradiograph for in situ imaging of solidification processes: Bringing in situ x-ray micro-imaging from the synchrotron to the laboratory. Review of Scientific Instruments. volum 82 (10).
    Academic article

2010

  • Delaleau, Pierre Patrick; Beckermann, Christoph; Mathiesen, Ragnvald; Arnberg, Lars. (2010) Mesoscopic Simulation of Dendritic Growth Observed in X-ray Video Microscopy During Directional Solidification of Al-Cu Alloys. ISIJ International. volum 50 (12).
    Academic article
  • Li, Yanjun; Chen, Yongjun; Walmsley, John; Dumoulin, Stephane; Mathiesen, Ragnvald; Roven, Hans Jørgen. (2010) Faceted interfacial structure of {1011} twins in Ti formed during equal channel angular pressing. Scripta Materialia. volum 62 (7).
    Academic article
  • Mathiesen, Ragnvald; Arnberg, Lars; Li, Yanjun; Snigirev, Anatoly; Snigireva, Irina; Dahle, Arne Kristian. (2010) X-Ray Video Microscopy Studies of Irregular Eutectic Solidification Microstructures in Al-Si-Cu Alloys. ISIJ International. volum 50 (12).
    Academic article
  • McFadden, Shaun; Schaffer, Paul; Mathiesen, Ragnvald; Browne, David. (2010) Analysis of an Equiaxed Dendrite Growth Model with Comparisons to In-Situ Results of Equiaxed Dendritic Growth in an Al-Ge Alloy. Materials Science Forum. volum 654-656.
    Academic article
  • Schaffer, Paul; Mathiesen, Ragnvald; Arnberg, Lars. (2010) In situ investigations of liquid-liquid phase separation in hypermonotectic alloys. Materials Science Forum. volum 649.
    Academic article
  • Schaffer, Paul; Mathiesen, Ragnvald; Arnberg, Lars. (2010) In-situ Investigation of Liquid-Liquid Phase Separation in Hypermonotectic Alloys. Materials Science Forum. volum 649.
    Academic article
  • Walmsley, John; Albertsen, Jorun Zahl; Friis, Jesper; Mathiesen, Ragnvald. (2010) The evolution and oxidation of carbides in an Alloy 601 exposed to long term high temperature corrosion conditions. Corrosion Science. volum 52 (12).
    Academic article
  • Zimmermann, Gerhard; Hecht, Ulrike; Mathes, Michael; Mathiesen, Ragnvald. (2010) Time resolved X-ray imaging of eutectic cellular patterns evolving during solidification of ternary Al-Cu-Ag alloys. International Journal of Materials Research - Zeitschrift für Metallkunde. volum 101 (12).
    Academic article

2009

  • Delaleau, Pierre; Mathiesen, Ragnvald; Schaffer, Paul; Arnberg, Lars. (2009) Impact of buoyancy on the growth of equiaxed grains in Al-Cu. International Journal of Cast Metals Research. volum 22 (1-4).
    Academic article
  • Ruvalcaba, Demian; Eskin, Dmitry; Mathiesen, Ragnvald; Arnberg, Lars; Katgerman, Laurens. (2009) Influence of dendrite arrangement on coarsening during solidification of high-solute Al alloys. International Journal of Cast Metals Research. volum 22 (1-4).
    Academic article
  • Ruvalcaba, Demian; Mathiesen, Ragnvald; Eskin, Dmitry; Arnberg, Lars; Katgerman, Laurens. (2009) In-situ analysis of coarsening during directional solidification experiments in high-solute aluminium alloys. Metallurgical and Materials Transactions B. volum 40 (3).
    Academic article
  • Schaffer, Paul; Mathiesen, Ragnvald; Arnberg, Lars. (2009) L2 droplet interaction with alpha-Al during solidification of hypermonotectic Al–8 wt.% Bi alloys. Acta Materialia. volum 57 (10).
    Academic article
  • Schaffer, Paul; Mathiesen, Ragnvald; Arnberg, Lars. (2009) Liquid decomposition, droplet coagulation and droplet-interface interactions in hypermonotectic Al-Bi alloys. Transactions of the Indian Institute of Metals. volum 62 (4-5).
    Academic article
  • Tucho, Wakshum Mekonnen; Venvik, Hilde Johnsen; Walmsley, John C; Stange, M; Ramachandran, Amutha; Mathiesen, Ragnvald; Borg, Anne; Bredesen, R; Holmestad, Randi. (2009) Microstructural studies of self-supported (1.5-10 mu m) Pd/23 wt% Ag hydrogen separation membranes subjected to different heat treatments. Journal of Materials Science. volum 44 (16).
    Academic article

2008

  • Albertsen, Jorun Zahl; Grong, Øystein; Walmsley, John C; Mathiesen, Ragnvald; Beek, W.J.. (2008) A Model for High-Temperature Pitting Corrosion in Nickel-Based Alloys Involving Internal Precipitation of Carbides, Oxides and Graphite. Metallurgical and Materials Transactions A. volum 39.
    Academic article
  • Forbord, Børge; Mathiesen, Ragnvald; Mårdalen, Jostein; Furu, Trond; Lange, Hans Iver. (2008) Elastic strain and texture evolution during tensile testing of peak-hardened Al-Mg-Si-profiles. Materials Science & Engineering: A. volum 479 (1-2).
    Academic article
  • Larsen, Magnus Hurlen; Walmsley, John C; Lunder, Otto; Mathiesen, Ragnvald; Nisancioglu, Kemal. (2008) Intergranular corrosion of copper-containing AA6xxx AlMgSi aluminum alloys. Journal of the Electrochemical Society. volum 155 (11).
    Academic article
  • Mathiesen, Ragnvald; Arnberg, Lars. (2008) X-Ray Imaging of Solidification Processes and Microstructure Evolution. ASM Handbook, volume 15, Casting.
    Academic chapter/article/Conference paper
  • Ratke, Lorenz; Gandin, Charles Andre; Mathiesen, Ragnvald; Rappaz, Michel; Rex, Stephan. (2008) Materials Solidification Physics in Space. EurophysicsNews. volum 39 (5).
    Article
  • Schaffer, Paul; Mathiesen, Ragnvald; Arnberg, Lars; Di Sabatino, Marisa; Snigirev, Anatoly. (2008) In situ investigation of spinodal decomposition in hypermonotectic Al–Bi and Al–Bi–Zn alloys. New Journal of Physics. volum 10.
    Academic article

2007

  • Walmsley, John C; Sævik, Øystein; Graver, Brit Kathrine F; Mathiesen, Ragnvald; Yu, Yingda; Nisancioglu, Kemal. (2007) Nature of Segregated Lead on Electrochemically Active AlPb Alloy. Journal of the Electrochemical Society. volum 154 (1).
    Academic article

2005

  • Mathiesen, Ragnvald; Arnberg, Lars. (2005) Stray crystal formation in Al-20wt.% Cu studied by synchrotron X-ray video microscopy. Materials Science & Engineering: A. volum 413-414.
    Academic article
  • Thorkildsen, Gunnar; Weckert, Edgar; Mo, Frode; Larsen, Helge Bøvik; Mathiesen, Ragnvald. (2005) Three-beam resonant X-ray diffraction in germanium - Laue transmission cases. Acta Crystallographica Section A: Foundations of Crystallography. volum 61.
    Academic article

2004

  • Birkedal, H; Madsen, Dennis; Mathiesen, Ragnvald; Knudsen, K; Weber, HP; Pattison, P; Schwarzenbach, D; Mathiesen, r*. (2004) The charge density of urea from synchrotron diffraction data. Acta Crystallographica Section A: Foundations of Crystallography. volum 60.
    Academic article

1998

  • Mathiesen, Ragnvald; Mo, Frode; Eikenes, Anders; Nyborg, Tanja; Larsen, Helge B.; Authier, Andre. (1998) Existence of Two Crystal Structures of the Complex alpha-D-Glucose NaCl H_2O (2:1:1) Verified by Three-Beam Diffraction Experiments. ?. volum A54.
    Academic article

Journal publications

  • Wang, Yeqing; Gao, Jianrong; Chao, Paul; Muyanja, Nancy S.; Mathiesen, Ragnvald; Shahani, Ashwin J.. (2021) In-situ evidence for impurity-induced formation of eutectic colonies in an interdendritic liquid. Materials Letters. volum 292.
    Academic article
  • Xu, Yijiang; Deng, Yun; Casari, Daniele; Mathiesen, Ragnvald; Liu, Xiangfa; Li, Yanjun. (2021) Growth kinetics of primary Si particles in hypereutectic Al-Si alloys under the influence of P inoculation: Experiments and modelling. Journal of Alloys and Compounds. volum 854.
    Academic article
  • Zha, Min; Zhang, Hongmin; Jia, Hailong; Gao, Yipeng; Jin, Shenbao; Sha, Gang; Bjørge, Ruben; Mathiesen, Ragnvald; Roven, Hans Jørgen; Wang, Hui-Yuan; Li, Yanjun. (2021) Prominent role of multi-scale microstructural heterogeneities on superplastic deformation of a high solid solution Al–7Mg alloy. International journal of plasticity. volum 146.
    Academic article
  • Feng, Shikang; Liotti, Enzo; Lui, Andrew; Wilson, Matthew D.; Connolley, Thomas; Mathiesen, Ragnvald; Grant, P. S.. (2020) In-situ X-ray radiography of primary Fe-rich intermetallic compound formation. Acta Materialia. volum 196.
    Academic article
  • Ormstrup, Jeppe; Østergaard, Emil V.; Detlefs, Carsten; Mathiesen, Ragnvald; Yildirim, Can; Kutsal, Mustafacan; Cook, Philip K.; Watier, Yves; Cosculluela, Carlos; Simons, Hugh. (2020) Imaging microstructural dynamics and strain fields in electro-active materials in situ with dark field x-ray microscopy. Review of Scientific Instruments. volum 91 (6).
    Academic article
  • Xu, Yijiang; Deng, Yun; Casari, Daniele; Mathiesen, Ragnvald; Li, Yanjun. (2020) In-situ X-radiographic study of nucleation and growth behaviour of primary silicon particles during solidification of a hypereutectic Al-Si alloy. Journal of Alloys and Compounds. volum 832.
    Academic article
  • Xu, Yijiang; Deng, Yun; Casari, Daniele; Mathiesen, Ragnvald; Liu, Xiangfa; Li, Yanjun. (2020) Revealing the nucleation kinetics of primary Si particles in hypereutectic Al-Si alloys under the influence of P inoculation. Journal of Materials Science. volum 55 (32).
    Academic article
  • Falch, Ken Vidar; Detlefs, Carsten; Christensen, Magnus Sebastian; Paganin, David; Mathiesen, Ragnvald. (2019) Experimental investigation of Gaussian random phase screen model for x-ray diffusers. Optics Express. volum 27 (15).
    Academic article
  • Mirihanage, Wajira; Falch, Ken Vidar; Casari, Daniele; McFadden, Shaun; Browne, David J.; Snigireva, I.; Snigirev, Anatoly; Li, Yanjun; Mathiesen, Ragnvald. (2019) Non-steady 3D dendrite tip growth under diffusive and weakly convective conditions. Materialia. volum 5.
    Academic article
  • Olofsson, Jakob; Salomonsson, Kent; Dahle, Arne K.; Mathiesen, Ragnvald. (2019) Three-dimensional study of nodule clustering and heterogeneous strain localization for tailored material properties in ductile iron. IOP Conference Series: Materials Science and Engineering. volum 529 (1).
    Academic article
  • Xu, Yijiang; Casari, Daniele; Mathiesen, Ragnvald; Li, Yanjun. (2019) Revealing the Heterogeneous Nucleation and Growth Behaviour of Grains in Inoculated Aluminium Alloys During Solidification. The Minerals, Metals & Materials Series.
    Academic article
  • Zhang, Qiuyuan; Polikarpov, Maxim; Nataliya, Klimova; Larsen, Helge Bøvik; Mathiesen, Ragnvald; Emerich, Hermann; Thorkildsen, Gunnar; Snigireva, Irina; Snigirev, Anatoly. (2019) Investigation of glitches induced by single-crystal diamond compound refractive lenses based on crystal orientation. AIP Conference Proceedings. volum 2054 (1).
    Academic article
  • Aucott, Lee; Dong, Hongbiao; Mirihanage, Wajira; Atwood, Robert; Kidess, Anton; Gao, Shian; Wen, Shuwen; Marsden, John; Feng, Shuo; Tong, Mingming; Connolley, Thomas; Drakopoulos, Michael; Kleijn, Chris R.; Richardson, Ian M.; Browne, David J.; Mathiesen, Ragnvald; Atkinson, Helen V.. (2018) Revealing internal flow behaviour in arc welding and additive manufacturing of metals. Nature Communications. volum 9.
    Academic article
  • Falch, Ken Vidar; Detlefs, Carsten; Snigirev, Anatoly; Mathiesen, Ragnvald. (2018) Analytical transmission cross-coefficients for pink beam X-ray microscopy based on compound refractive lenses. Ultramicroscopy. volum 184 (B).
    Academic article
  • Falch, Ken Vidar; Lyubormiskiy, Mikhail; Casari, Daniele; Snigirev, Anatoly; Snigireva, Irina; Detlefs, Carsten; Di Michiel, Marco; Lyatun, Ivan; Mathiesen, Ragnvald. (2018) Zernike phase contrast in high-energy x-ray transmission microscopy based on refractive optics. Ultramicroscopy. volum 184 (A).
    Academic article
  • Xu, Yijiang; Casari, Daniele; Mathiesen, Ragnvald; Li, Yanjun. (2018) Revealing the heterogeneous nucleation behavior of equiaxed grains of inoculated Al alloys during directional solidification. Acta Materialia. volum 149.
    Academic article
  • Zha, Min; Yu, Zhi-Yuan; Qian, Feng; Wang, Huiyuan; Li, Yanjun; Mathiesen, Ragnvald; Roven, Hans Jørgen. (2018) Achieving dispersed fine soft Bi particles and grain refinement in a hypermonotectic Al–Bi alloy by severe plastic deformation and annealing. Scripta Materialia. volum 155.
    Academic article
  • Zhang, Qiuyuan; Polikarpov, Maxim; Klimova, Nataliya; Larsen, Helge Bøvik; Mathiesen, Ragnvald; Emerich, Hermann; Thorkildsen, Gunnar; Snigireva, Irina; Snigirev, Anatoly. (2018) Investigation of `glitches' in the energy spectrum induced by single-crystal diamond compound X-ray refractive lenses. Journal of Synchrotron Radiation. volum 26.
    Academic article
  • Bjurenstedt, Anton; Casari, Daniele; Seifeddine, Salem; Mathiesen, Ragnvald; Dahle, Arne Kristian. (2017) In-situ study of morphology and growth of primary alpha-Al(FeMnCr)Si intermetallics in an Al-Si alloy. Acta Materialia. volum 130.
    Academic article
  • Browne, David J.; García-Moreno, Francisco; Nguyen-Thi, Henri; Zimmermann, Gerhard; Kargl, Florian; Mathiesen, Ragnvald; Griesche, Axel; Minster, Olivier. (2017) Overview of in situ X-Ray studies of light alloy solidification in microgravity. The Minerals, Metals & Materials Series. volum Part XII.
    Academic article
  • Casari, Daniele; Mirihanage, Wajira; Falch, Ken Vidar; Ringdalen, Inga Gudem; Friis, Jesper; Schmid-Fetzer, Rainer; Zhao, Dongdong; Li, Yanjun; Sillekens, Wim H.; Mathiesen, Ragnvald. (2017) Morphological transition of α-Mg dendrites during near-isothermal solidification of a Mg-Nd-Gd-Zn-Zr casting alloy. The Minerals, Metals & Materials Series. volum Part F8.
    Academic article
  • Falch, Ken Vidar; Casari, Daniele; Di Michiel, Marco; Detlefs, Carsten; Snigirev, Anatoly; Snigireva, Irina; Honkimäki, Veijo; Mathiesen, Ragnvald. (2017) In situ hard X-ray transmission microscopy for material science. Journal of Materials Science. volum 52 (6).
    Academic article
  • Jia, Hailong; Bjørge, Ruben; Marthinsen, Knut; Mathiesen, Ragnvald; Li, Yanjun. (2017) Soft particles assisted grain refinement and strengthening of an Al-Bi-Zn alloy subjected to ECAP. Materials Science & Engineering: A. volum 703.
    Academic article
  • Xu, Yijiang; Casari, Daniele; Du, Qiang; Mathiesen, Ragnvald; Arnberg, Lars; Li, Yanjun. (2017) Heterogeneous nucleation and grain growth of inoculated aluminium alloys: An integrated study by in-situ X-radiography and numerical modelling. Acta Materialia. volum 140.
    Academic article
  • Casari, Daniele; Mirihanage, Wajira; Falch, Ken Vidar; Ringdalen, Inga Gudem; Friis, Jesper; Schmid-Fetzer, Rainer; Zhao, Dongdong; Li, Yanjun; Sillekens, Wim H.; Mathiesen, Ragnvald. (2016) α-Mg primary phase formation and dendritic morphology transition in solidification of a Mg-Nd-Gd-Zn-Zr casting alloy. Acta Materialia. volum 116.
    Academic article
  • Falch, Ken Vidar; Detlefs, Carsten; Di Michiel, Marco; Snigireva, Irina; Snigirev, Anatoly; Mathiesen, Ragnvald. (2016) Correcting lateral chromatic aberrations in non-monochromatic X-ray microscopy. Applied Physics Letters. volum 109 (5).
    Academic article
  • Mathiesen, Ragnvald. (2016) Det europeiske superrøntgenanlegget ESRF under oppgradering. Fra Fysikkens Verden. volum 78.
    Popular scientific article
  • Murphy, A.G.; Browne, DJ; Houltz, Y; Mathiesen, Ragnvald. (2016) In situ X-ray observations of gas porosity interactions with dendritic microstructures during solidification of Al-based alloys. IOP Conference Series: Materials Science and Engineering. volum 117 (1).
    Academic article
  • Murphy, Andrew G.; Mathiesen, Ragnvald; Houltz, Ylva; Li, J.; Lockowandt, C; Henriksson, K; Melville, N; Browne, David J.. (2016) Direct observation of spatially isothermal equiaxed solidification of an Al–Cu alloy in microgravity onboard the MASER13 sounding rocket. Journal of Crystal Growth. volum 454.
    Academic article
  • Murphy, Andrew G; Mathiesen, Ragnvald; Houltz, Ylva; Li, J; Lockowandt, C; Henriksson, K.J.; Zimmermann, Gerhard; Browne, David J.; Melville, N. (2016) XRMON-SOL: Isothermal equiaxed solidification of a grain refined Al-20 wt%Cu alloy. Journal of Crystal Growth. volum 440.
    Academic article
  • Sillekens, W.H.; Casari, Daniele; Mirihanage, Wajira U.; Terzi, S; Mathiesen, Ragnvald; Salvo, L; Daudin, R; LHUISSIER, P; Guo, E; Lee, P. D.. (2016) The Use of In Situ X-ray Imaging Methods in the Research and Development of Magnesium-Based Grain-Refined and Nanocomposite Materials. JOM. volum 68 (12).
    Academic article
  • Li, Yanjun; Xu, Yijiang; Du, Qiang; Arnberg, Lars; Mathiesen, Ragnvald. (2015) Numerical modelling and in-situ radiographic study of the grain nucleation and growth of inoculated aluminum alloys. IOP Conference Series: Materials Science and Engineering. volum 84 (1).
    Academic article
  • Mirihanage, Wajira; Di Michiel, Marco; Mathiesen, Ragnvald. (2015) Ultra-fast in-situ X-ray studies of evolving columnar dendrites in solidifying steel weld pools. IOP Conference Series: Materials Science and Engineering. volum 84 (1).
    Academic article
  • Mo, Frode; Mathiesen, Ragnvald; Beukes, Jon Are; Vu, Khanh Minh. (2015) Rochelle salt - A structural reinvestigation with improved tools. I. the high-temperature paraelectric phase at 308 - K. IUCrJ. volum 2 (1).
    Academic article
  • Murphy, A. G.; Mirihanage, Wajira; Browne, DJ; Mathiesen, Ragnvald. (2015) Equiaxed dendritic solidification and grain refiner potency characterised through in situ X-radiography. Acta Materialia. volum 95.
    Academic article
  • Reiten, Andreas; Chernyshov, Dmitry; Mathiesen, Ragnvald. (2015) Nebula: Reconstruction and visualization of scattering data in reciprocal space. Journal of Applied Crystallography. volum 48.
    Academic article
  • Zha, Min; Li, Yanjun; Mathiesen, Ragnvald; Bjørge, Ruben; Roven, Hans Jørgen. (2015) High ductility bulk nanostructured Al-Mg binary alloy processed by equal channel angular pressing and inter-pass annealing. Scripta Materialia. volum 105.
    Academic article
  • Zha, Min; Li, Yanjun; Mathiesen, Ragnvald; Bjørge, Ruben; Roven, Hans Jørgen. (2015) Microstructure evolution and mechanical behavior of a binary Al-7Mg alloy processed by equal-channel angular pressing. Acta Materialia. volum 84.
    Academic article
  • Høydalsvik, Kristin; Fløystad, Jostein Bø; Zhao, Tiejun; Esmaeili, Morteza; Diaz, Ana; Andreasen, Jens Wenzel; Mathiesen, Ragnvald; Rønning, Magnus; Breiby, Dag Werner. (2014) In situ X-ray ptychography imaging of high-temperature CO2 acceptor particle agglomerates. Applied Physics Letters. volum 104 (24).
    Academic article
  • Liotti, E; Lui, A; Vincent, R.; Kumar, S; Guo, Z; Connolley, T; Dolbnya, I.P.; Hart, M; Arnberg, Lars; Mathiesen, Ragnvald; Grant, P. S.. (2014) A synchrotron X-ray radiography study of dendrite fragmentation induced by a pulsed electromagnetic field in an Al-15Cu alloy. Acta Materialia. volum 70.
    Academic article
  • Mirihanage, Wajira; Di Michel, Marco; Reiten, Andreas; Arnberg, Lars; Dong, Hongbiao; Mathiesen, Ragnvald. (2014) Time-resolved X-ray diffraction studies of solidification microstructure evolution in welding. Acta Materialia. volum 68.
    Academic article
  • Mirihanage, Wajira; Falch, Ken Vidar; Snigireva, Irina; Snigirev, A; Li, Yanjun; Arnberg, Lars; Mathiesen, Ragnvald. (2014) Retrieval of three-dimensional spatial information from fast in situ two-dimensional synchrotron radiography of solidification microstructure evolution. Acta Materialia. volum 81.
    Academic article
  • Nguyen-Thi, Henri; Reinhart, Guillaume; Salloum-Abou-Jaoudé, Georges; Browne, David; Murphy, Anthony G.; Houltz, Ylva; Li, J.; Voss, Daniela H.; Verga, Antonio; Mathiesen, Ragnvald; Zimmermann, Gerhard. (2014) XRMON-GF experiments devoted to the in situ X-ray radiographic observation of growth process in microgravity conditions. Microgravity, science and technology. volum 26 (1).
    Academic article
  • Salloum-Abou-Jaoude, G; Nguyen-Thi, H; Reinhart, G; Mathiesen, Ragnvald; Zimmermann, G; Voss, D. (2014) A synchrotron X-ray radiography study of dendrite fragmentation induced by a pulsed electromagnetic field in an Al–15Cu alloy. Materials Science Forum. volum 790-791.
    Academic article
  • Salloum-Abou-Jaoudé, Georges; Nguyen-Thi, Henri; Reinhart, Guillaume; Mathiesen, Ragnvald; Zimmermann, Gerhard; Voss, Daniela H.. (2014) Characterization of Motion of Dendrite Fragment by X-Ray Radiography on Earth and under Microgravity Environment. Materials Science Forum. volum 790-791.
    Academic article
  • Zha, Min; Li, Yanjun; Mathiesen, Ragnvald; Baumgart, Christine; Roven, Hans Jørgen. (2014) Influence on Mg content, grain size and strain rate on mechanical properties and DSA behaviour of Al-Mg alloys processed by ECAP and annealing. Materials Science Forum. volum 794-796.
    Academic article
  • Zha, Min; Li, Yanjun; Mathiesen, Ragnvald; Bjørge, Ruben; Roven, Hans Jørgen. (2014) Achieve high ductility and strength in an Al-Mg alloy by severe plastic deformation combined with inter-pass annealing. Materials Science & Engineering: A. volum 598.
    Academic article
  • Zha, Min; Li, Yanjun; Mathiesen, Ragnvald; Bjørge, Ruben; Roven, Hans Jørgen. (2014) Microstructure, hardness evolution and thermal stability of binary Al-7Mg alloy processed by ECAP with intermediate annealing. Transactions of Nonferrous Metals Society of China. volum 24 (7).
    Academic article
  • Zha, Min; Li, Yanjun; Mathiesen, Ragnvald; Roven, Hans. (2014) Dispersion of soft Bi particles and grain refinement of matrix in an Al-Bi alloy by equal channel angular pressing. Journal of Alloys and Compounds. volum 605.
    Letter to the editor
  • Liotti, E; Lui, A; Vincent, R.; Kumar, S.; Guo, Z; Connolley, T; Hart, M; Arnberg, Lars; Mathiesen, Ragnvald; Grant, P.S.. (2013) A Synchrotron X-ray Radiography Investigation of Induced Dendrite Fragmentation in Al-15wt%Cu. Materials Science Forum. volum 765.
    Academic article
  • Murphy, A. G.; Browne, DJ; Mirihanage, Wajira; Mathiesen, Ragnvald. (2013) Combined in situ X-ray radiographic observations and post-solidification metallographic characterisation of eutectic transformations in Al-Cu alloy systems. Acta Materialia. volum 61 (12).
    Academic article
  • Nguyen-Thi, H; Reinhart, G; Abou Jaoude, G.S.; Mathiesen, Ragnvald; Zimmermann, Gerhard; Houltz, Y; Voss, D; Verga, A; Browne, DJ; Murphy, A. G.. (2013) XRMON-GF: A novel facility for solidification of metallic alloys with in situ and time-resolved X-ray radiographic characterization in microgravity conditions. Journal of Crystal Growth. volum 374.
    Academic article
  • Zha, Min; Li, Yanjun; Mathiesen, Ragnvald; Bjørge, Ruben; Roven, Hans Jørgen. (2013) Annealing response of binary Al-7Mg alloy deformed by equal channel angular pressing. Materials Science & Engineering: A. volum 586.
    Academic article
  • Mathiesen, Ragnvald; Arnberg, Lars; Nguyen-Thi, H; Billia, B. (2012) In situ X-ray video microscopy as a tool in solidification science. JOM. volum 64 (1).
    Academic article
  • Mirihanage, Wajira; Arnberg, Lars; Mathiesen, Ragnvald. (2012) In-situ observation of transient columnar dendrite growth in the presence of thermo-solutal convection. IOP Conference Series: Materials Science and Engineering. volum 33.
    Academic article
  • Nguyen-Thi, H; Salvo, L; Mathiesen, Ragnvald; Arnberg, Lars; Billia, B; Suery, M; Reinhart, G. (2012) On the interest of synchrotron X-ray imaging for the study of solidification in metallic alloys. Comptes rendus. Physique. volum 13 (3).
    Academic article
  • Anawati, Ms; Diplas, Spyridon; Holme, Børge; Solberg, Jan Ketil; Mathiesen, Ragnvald; Walmsley, John; Nisancioglu, Kemal. (2011) Surface Characterization of Heat Treated AlPbCu Model Alloys. Journal of the Electrochemical Society. volum 158 (6).
    Academic article
  • Mathiesen, Ragnvald; Arnberg, Lars; Li, Yanjun; Meier, Vivienne; Schaffer, Paul; Snigireva, Irina; Snigirev, Anatoly; Dahle, Arne Kristian. (2011) X-Ray Videomicroscopy Studies of Eutectic Al-Si Solidification in Al-Si-Cu. Metallurgical and Materials Transactions A. volum 42A (1).
    Academic article
  • Nguyen-Thi, H; Bogno, A; Reinhart, G; Billia, B; Mathiesen, Ragnvald; Zimmermann, Gerhard; Houltz, Y; Loth, K; Voss, D; Verga, A; de Pascale, F. (2011) Investigation of gravity effects on solidification of binary alloys with in situ X-ray radiography on earth and in microgravity environment. Journal of Physics: Conference Series (JPCS). volum 327 (012012).
    Academic article
  • Rakete, Christoph; Baumbach, C; Goldschmidt, A; Samberg, D; Schroer, C.G.; Breede, F; Stenzel, C; Zimmermann, Gerhard; Pickmann, C; Houltz, Y; Lockowandt, C; Svenonius, O; Wiklund, P; Mathiesen, Ragnvald. (2011) Compact x-ray microradiograph for in situ imaging of solidification processes: Bringing in situ x-ray micro-imaging from the synchrotron to the laboratory. Review of Scientific Instruments. volum 82 (10).
    Academic article
  • Delaleau, Pierre Patrick; Beckermann, Christoph; Mathiesen, Ragnvald; Arnberg, Lars. (2010) Mesoscopic Simulation of Dendritic Growth Observed in X-ray Video Microscopy During Directional Solidification of Al-Cu Alloys. ISIJ International. volum 50 (12).
    Academic article
  • Li, Yanjun; Chen, Yongjun; Walmsley, John; Dumoulin, Stephane; Mathiesen, Ragnvald; Roven, Hans Jørgen. (2010) Faceted interfacial structure of {1011} twins in Ti formed during equal channel angular pressing. Scripta Materialia. volum 62 (7).
    Academic article
  • Mathiesen, Ragnvald; Arnberg, Lars; Li, Yanjun; Snigirev, Anatoly; Snigireva, Irina; Dahle, Arne Kristian. (2010) X-Ray Video Microscopy Studies of Irregular Eutectic Solidification Microstructures in Al-Si-Cu Alloys. ISIJ International. volum 50 (12).
    Academic article
  • McFadden, Shaun; Schaffer, Paul; Mathiesen, Ragnvald; Browne, David. (2010) Analysis of an Equiaxed Dendrite Growth Model with Comparisons to In-Situ Results of Equiaxed Dendritic Growth in an Al-Ge Alloy. Materials Science Forum. volum 654-656.
    Academic article
  • Schaffer, Paul; Mathiesen, Ragnvald; Arnberg, Lars. (2010) In situ investigations of liquid-liquid phase separation in hypermonotectic alloys. Materials Science Forum. volum 649.
    Academic article
  • Schaffer, Paul; Mathiesen, Ragnvald; Arnberg, Lars. (2010) In-situ Investigation of Liquid-Liquid Phase Separation in Hypermonotectic Alloys. Materials Science Forum. volum 649.
    Academic article
  • Walmsley, John; Albertsen, Jorun Zahl; Friis, Jesper; Mathiesen, Ragnvald. (2010) The evolution and oxidation of carbides in an Alloy 601 exposed to long term high temperature corrosion conditions. Corrosion Science. volum 52 (12).
    Academic article
  • Zimmermann, Gerhard; Hecht, Ulrike; Mathes, Michael; Mathiesen, Ragnvald. (2010) Time resolved X-ray imaging of eutectic cellular patterns evolving during solidification of ternary Al-Cu-Ag alloys. International Journal of Materials Research - Zeitschrift für Metallkunde. volum 101 (12).
    Academic article
  • Delaleau, Pierre; Mathiesen, Ragnvald; Schaffer, Paul; Arnberg, Lars. (2009) Impact of buoyancy on the growth of equiaxed grains in Al-Cu. International Journal of Cast Metals Research. volum 22 (1-4).
    Academic article
  • Ruvalcaba, Demian; Eskin, Dmitry; Mathiesen, Ragnvald; Arnberg, Lars; Katgerman, Laurens. (2009) Influence of dendrite arrangement on coarsening during solidification of high-solute Al alloys. International Journal of Cast Metals Research. volum 22 (1-4).
    Academic article
  • Ruvalcaba, Demian; Mathiesen, Ragnvald; Eskin, Dmitry; Arnberg, Lars; Katgerman, Laurens. (2009) In-situ analysis of coarsening during directional solidification experiments in high-solute aluminium alloys. Metallurgical and Materials Transactions B. volum 40 (3).
    Academic article
  • Schaffer, Paul; Mathiesen, Ragnvald; Arnberg, Lars. (2009) L2 droplet interaction with alpha-Al during solidification of hypermonotectic Al–8 wt.% Bi alloys. Acta Materialia. volum 57 (10).
    Academic article
  • Schaffer, Paul; Mathiesen, Ragnvald; Arnberg, Lars. (2009) Liquid decomposition, droplet coagulation and droplet-interface interactions in hypermonotectic Al-Bi alloys. Transactions of the Indian Institute of Metals. volum 62 (4-5).
    Academic article
  • Tucho, Wakshum Mekonnen; Venvik, Hilde Johnsen; Walmsley, John C; Stange, M; Ramachandran, Amutha; Mathiesen, Ragnvald; Borg, Anne; Bredesen, R; Holmestad, Randi. (2009) Microstructural studies of self-supported (1.5-10 mu m) Pd/23 wt% Ag hydrogen separation membranes subjected to different heat treatments. Journal of Materials Science. volum 44 (16).
    Academic article
  • Albertsen, Jorun Zahl; Grong, Øystein; Walmsley, John C; Mathiesen, Ragnvald; Beek, W.J.. (2008) A Model for High-Temperature Pitting Corrosion in Nickel-Based Alloys Involving Internal Precipitation of Carbides, Oxides and Graphite. Metallurgical and Materials Transactions A. volum 39.
    Academic article
  • Forbord, Børge; Mathiesen, Ragnvald; Mårdalen, Jostein; Furu, Trond; Lange, Hans Iver. (2008) Elastic strain and texture evolution during tensile testing of peak-hardened Al-Mg-Si-profiles. Materials Science & Engineering: A. volum 479 (1-2).
    Academic article
  • Larsen, Magnus Hurlen; Walmsley, John C; Lunder, Otto; Mathiesen, Ragnvald; Nisancioglu, Kemal. (2008) Intergranular corrosion of copper-containing AA6xxx AlMgSi aluminum alloys. Journal of the Electrochemical Society. volum 155 (11).
    Academic article
  • Ratke, Lorenz; Gandin, Charles Andre; Mathiesen, Ragnvald; Rappaz, Michel; Rex, Stephan. (2008) Materials Solidification Physics in Space. EurophysicsNews. volum 39 (5).
    Article
  • Schaffer, Paul; Mathiesen, Ragnvald; Arnberg, Lars; Di Sabatino, Marisa; Snigirev, Anatoly. (2008) In situ investigation of spinodal decomposition in hypermonotectic Al–Bi and Al–Bi–Zn alloys. New Journal of Physics. volum 10.
    Academic article
  • Walmsley, John C; Sævik, Øystein; Graver, Brit Kathrine F; Mathiesen, Ragnvald; Yu, Yingda; Nisancioglu, Kemal. (2007) Nature of Segregated Lead on Electrochemically Active AlPb Alloy. Journal of the Electrochemical Society. volum 154 (1).
    Academic article
  • Mathiesen, Ragnvald; Arnberg, Lars. (2005) Stray crystal formation in Al-20wt.% Cu studied by synchrotron X-ray video microscopy. Materials Science & Engineering: A. volum 413-414.
    Academic article
  • Thorkildsen, Gunnar; Weckert, Edgar; Mo, Frode; Larsen, Helge Bøvik; Mathiesen, Ragnvald. (2005) Three-beam resonant X-ray diffraction in germanium - Laue transmission cases. Acta Crystallographica Section A: Foundations of Crystallography. volum 61.
    Academic article
  • Birkedal, H; Madsen, Dennis; Mathiesen, Ragnvald; Knudsen, K; Weber, HP; Pattison, P; Schwarzenbach, D; Mathiesen, r*. (2004) The charge density of urea from synchrotron diffraction data. Acta Crystallographica Section A: Foundations of Crystallography. volum 60.
    Academic article
  • Mathiesen, Ragnvald; Mo, Frode; Eikenes, Anders; Nyborg, Tanja; Larsen, Helge B.; Authier, Andre. (1998) Existence of Two Crystal Structures of the Complex alpha-D-Glucose NaCl H_2O (2:1:1) Verified by Three-Beam Diffraction Experiments. ?. volum A54.
    Academic article

Part of book/report

  • Mathiesen, Ragnvald; Arnberg, Lars. (2008) X-Ray Imaging of Solidification Processes and Microstructure Evolution. ASM Handbook, volume 15, Casting.
    Academic chapter/article/Conference paper

Report

  • Brataas, Arne; Mathiesen, Ragnvald; Grande, Tor; Roven, Hans Jørgen; Grepstad, Jostein; Echtermeyer, Andreas; Johnsen, Roy; Krøkje, Åse. (2013) Enabling technologies at NTNU; materials science and engineering. 2013.
    Report

Teaching

Courses

  • FY1001 - Mechanical Physics
  • FY8917 - Solid State Physics, Advanced Course
  • TFY4245 - Solid State Physics, Advanced Course

Media

2022

  • Academic lecture
    Li, Yanjun; Wang, Shubo; Mathiesen, Ragnvald. (2022) Electric current flash heating (ECFH) induced abnormal nucleation and grain growth behavior during recrystallization of deformed aluminium alloys. The 8th International Conference on Solid -Solid Phase Transformations in Inorganic Materials ; Xi'an. 2022-06-27 - 2022-07-01.
  • Academic lecture
    Mirzaei, Fazel; Tekseth, Kim Robert Bjørk; Scheidl, Katharina; Kaestner, Anders; Mathiesen, Ragnvald; Breiby, Dag Werner. (2022) Time-resolved 3D imaging of frost heave using neutron and X-ray computed tomography. Nordic perspectives on advanced neutron imaging ; 2022-11-23 - 2022-11-25.
  • Poster
    Mirzaei, Fazel; Tekseth, Kim Robert Bjørk; Younas, Daniyal; Jaiswal, Mukul; Scheidl, Katharina; Kaestner, Anders; Chattopadhyay, Basab; Mathiesen, Ragnvald; Breiby, Dag Werner. (2022) Towards a quantitative microscale understanding of freezing soil using neutron and X-ray tomography. Research School for Training the Next Generation of Micro- and Nanotechnology Researchers in Norway (TNNN) ; 2022-11-30 - 2022-12-02.

2019

  • Academic lecture
    Mathiesen, Ragnvald. (2019) On the usage and tuning of beam coherence in ultra-fast high-energy X-ray transmission microscopy. International Baltic School 2019: 4th generation X-ray sources: Coherent optics and Techniques . Immanuel Kant Baltic Federal University; Kaliningrad. 2019-08-26 - 2019-08-29.
  • Academic lecture
    Mathiesen, Ragnvald. (2019) Real-time studies of dendritic growth in binary alloys by in-situ synchrotron X-ray imaging. Chineese Materials Conference CMC 2019 ; Chengdu. 2019-07-10 - 2019-07-14.
  • Academic lecture
    Mathiesen, Ragnvald. (2019) Recent advances in 3-4D in situ X-ray imaging of solidification dynamics and microstructure formation. MRS Fall meeting . Materials Res. Soc.; Boston, MA. 2019-12-01 - 2019-12-06.
  • Academic lecture
    Mathiesen, Ragnvald. (2019) X-ray imaging - towards studies of condensed matter at the mesoscale. Invitert foredrag . Inst. for matematikk og fysikk, UiS; Stavanger. 2019-02-15 - 2019-02-15.
  • Academic lecture
    Mürer, Fredrik Kristoffer; Chattopadhyay, Basab; Madathiparambil, Aldritt Scaria; Tekseth, Kim Robert Bjørk; Di Michiel, Marco; Mathiesen, Ragnvald; Olstad, Kristin; Lilledahl, Magnus Borstad; Breiby, Dag Werner. (2019) 3D imaging of bone and cartilage by X-ray phase-contrast and diffraction computed tomography. NanoNetwork, 10th annual workshop ; Tromsø. 2019-06-17 - 2019-06-19.
  • Poster
    Mürer, Fredrik Kristoffer; Chattopadhyay, Basab; Madathiparambil, Aldritt Scaria; Tekseth, Kim Robert Bjørk; Di Michiel, Marco; Mathiesen, Ragnvald; Olstad, Kristin; Lilledahl, Magnus Borstad; Breiby, Dag Werner. (2019) 3D imaging of bone and cartilage by X-ray phase-contrast and orientational diffraction tomography. ESRF User Meeting . ESRF; Grenoble. 2019-02-04 - 2019-02-06.
  • Poster
    Mürer, Fredrik Kristoffer; Chattopadhyay, Basab; Madathiparambil, Aldritt Scaria; Tekseth, Kim Robert Bjørk; Di Michiel, Marco; Mathiesen, Ragnvald; Olstad, Kristin; Lilledahl, Magnus Borstad; Breiby, Dag Werner. (2019) Orientational imaging of bone and cartilage using small- and wide-angle X-ray scattering. Nordic Workshop on Scattering from Soft Matter (NSSM 2019) . iNano, University of Aarhus; Århus. 2019-01-08 - 2019-02-09.

2018

  • Academic lecture
    Mathiesen, Ragnvald. (2018) In-situ X-ray imaging of evolving solidification microstructures. Invitert foredrag . Changchun University of Science and Technology; Changchun. 2018-07-17 - 2018-07-17.
  • Academic lecture
    Mathiesen, Ragnvald. (2018) In-situ X-ray imaging of evolving solidification microstructures. Invitert foredrag . Dalian University of Technology; Dalian. 2018-07-16.
  • Academic lecture
    Mathiesen, Ragnvald. (2018) In-situ X-ray studies of evolving solidification microstructures. Invitert foredrag . Institute for Metals Research - Chineese Academy of Siences; Shenyang. 2018-07-13 - 2018-07-13.
  • Academic lecture
    Mathiesen, Ragnvald. (2018) On the application of in-situ X-ray imaging techniques in solidification science. Invitert foredrag . Shenyang University; Shenyang. 2018-07-06 - 2018-07-06.
  • Interview
    Sund, Steinar; Breiby, Dag Werner; Mathiesen, Ragnvald. (2018) Store ambisjoner for røntgenlaser. Aftenposten Vitenskap [Tidsskrift]. 2018-01-20.
  • Poster
    Zhang, Qiuyuan; Larsen, Helge Bøvik; Mathiesen, Ragnvald. (2018) Investigation of glitches induced by single-crystal diamond compound refractive lenses. Synchrotron Radiation Instrumentation (SRI 2018) ; 2018-06-10 - 2018-06-15.
  • Poster
    Zhang, Qiuyuan; Polikarpov, Maxim; Klimova, Nataliya; Larsen, Helge Bøvik; Mathiesen, Ragnvald; Emerich, Hermann; Snigireva, Irina; Snigirev, Anatoly. (2018) Glitch spectroscopy of X-ray compound refractive lenses. Poster . ESRF; 2018-02-05 - 2018-02-07.

2017

  • Academic lecture
    Browne, D. J.; Garcia-Moreno, F; Nguyen-Thi, H.; Zimmermann, G.; Kargl, F.; Mathiesen, Ragnvald; Griesche, A.; Minster, O.. (2017) Overview of In Situ X-Ray Studies of Light Alloy Solidification in Microgravity. TMS 2017 . TMS; San Diego. 2017-02-26 - 2017-03-02.
  • Academic lecture
    Casari, Daniele; Mirihanage, Wajira; Falch, Ken Vidar; Ringdalen, Inga Gudem; Friis, Jesper; Schmid-Fetzer, Rainer; Zhao, Dongdong; Li, Yanjun; Silikens, Wim H; Mathiesen, Ragnvald. (2017) Morphological Transition of a-Mg Dendrites During Near-Isothermal Solidification of a Mg–Nd–Gd–Zn–Zr Casting Alloy. TMS 2017 . TMS; San Diego. 2017-02-26 - 2017-03-02.
  • Academic lecture
    Casari, Daniele; Mirihanage, Wajira; Falch, Ken Vidar; Ringdalen, Inga Gudem; Friis, Jesper; Schmid-Fetzer, Rainer; Zhao, Dongdong; Li, Yanjun; Silikens, Wim H; Mathiesen, Ragnvald. (2017) Morphological Transition of alpha-Mg Dendrites during Near-Isothermal Solidification of an Mg-Nd-Gd-Zn-Zr Casting Alloy. Solidification Processing 2017 (SP17) . BCAST, Brunel Univ. London, UK; Beaumont Estate, Old Windsor, UK. 2017-07-25 - 2017-07-29.
  • Academic lecture
    Falch, Ken Vidar; Mathiesen, Ragnvald. (2017) Zernike Phase Contrast for Hard X-ray Transmission Microscopy. TMS2017 ; San Diego Convention Center. 2017-02-26 - 2017-03-02.
  • Academic lecture
    Mathiesen, Ragnvald. (2017) Hard X-ray Transmission Microscopy. Swiss-Norwegian Workshop on Synchrotron and FEL-based Research . SNX, SNBL, PSI; Gradermoen. 2017-06-06 - 2017-06-07.
  • Academic lecture
    Mathiesen, Ragnvald. (2017) Hard X-ray Transmission Microscopy (HXTM). SINTEF MC group seminar, Material physics . SINTEF MC; Trondheim. 2017-10-19 - 2017-10-19.
  • Interview
    Mathiesen, Ragnvald; Idsø, Øyvind. (2017) Denne drypper nesten aldri. Hver gang den gjør det, jubler forskerne. Dagbladet [Avis]. 2017-05-17.
  • Academic lecture
    Mirihanage, Wajira; Casari, Daniele; Falch, Ken Vidar; Mathiesen, Ragnvald. (2017) Examining Columnar Dendritic Growth under Dynamic Solute Concentration Level Variations. Solidification Processing 2017 (SP17) . BCAST, Brunel Univ. London, UK; Beaumont Estate, Old Windsor, UK. 2017-07-25 - 2017-07-29.
  • Academic lecture
    Nguyen-Thi, Henri; Browne, David J.; Zimmermann, Gerhard; Reinhart, Guillaume; Murphy, Andrew G; Salloum-Abou-Jaoudé, Georges; Abou-Khalil, L; Mathiesen, Ragnvald; Silikens, Wim H. (2017) Overivew of In Situ X-ray Studies of Metal Alloy Solidification in Microgravity Conditions - The XRMON Project. Solidification Processing 2017 (SP17) . BCAST, Brunel Univ. London, UK; Beaumont Estate, Old Windsor, UK. 2017-07-25 - 2017-07-29.
  • Academic lecture
    Xu, Yijiang; Casari, Daniele; Mathiesen, Ragnvald; Liu, X.F.; Li, Yanjun. (2017) Nucleation and Growth of Primary Si during Solidification of Hypereutectic Al-Si Alloys: A Combined in situ X-radiography and ex situ TP-1 Type Test. Solidification Processing 2017 (SP17) . BCAST, Brunel Univ. London, UK; Beaumont Estate, Old Windsor, UK. 2017-07-25 - 2017-07-28.

2016

  • Poster
    Falch, Ken Vidar; Mathiesen, Ragnvald. (2016) Polychromatic synchrotron radiation x-ray microscopy. SCANDEM . NTNU; Trondheim. 2016-06-07 - 2016-06-10.
  • Academic lecture
    Mathiesen, Ragnvald; Falch, Ken Vidar. (2016) Hard X-ray Transmission Microscopy. CINEMA Midterm Workshop . DTU Fysikk; København. 2016-09-15 - 2016-09-16.

2015

  • Lecture
    Mathiesen, Ragnvald. (2015) ESRF Phase II Source Upgrade. Norwegian Synchrotron and Neutron User Meeting ; Sola. 2015-01-19 - 2015-01-20.
  • Academic lecture
    Mathiesen, Ragnvald. (2015) Solidification microstructure evolution in simulated spot welding by ultra-fast time-resolved X-ray diffraction. ICSSP6 ; Hyderabad. 2015-11-24 - 2015-11-27.
  • Academic lecture
    Mirihanage, Wajira; Di Michiel, Marco; Mathiesen, Ragnvald. (2015) Ultra-fast in-situ X-ray studies of evolving columnar dendrites in solidifying steel weld pools. MCWASP XIV: INTERNATIONAL CONFERENCE ON MODELLING OF CASTING, WELDING AND ADVANCED SOLIDIFICATION PROCESSES ; 2015-06-21 - 2015-06-26.
  • Poster
    Reiten, Andreas; Mathiesen, Ragnvald; Chernyshov, Dimitry. (2015) Strain-induced relaxor to anti-ferroelectric transition in PMN-PT thin films. Norwegian Synchrotron and Neutron User Meeting ; Sola. 2015-01-19 - 2015-01-20.

2014

  • Academic lecture
    Zha, Min; Li, Yanjun; Mathiesen, Ragnvald; Bjørge, Ruben; Roven, Hans Jørgen. (2014) A bimodal microstructure and improved mechanical properties of an Al-Mg alloy processed by ECAP combined with inter-pass annealing. NanoSPD6 ; 2014-06-29 - 2014-07-04.
  • Academic lecture
    Zha, Min; Li, Yanjun; Mathiesen, Ragnvald; Bjørge, Ruben; Roven, Hans Jørgen. (2014) Development of high strength and high ductility Al-Mg alloys by ECAP and inter-pass annealing. NMS SOMMERMØTE 2014 ; 2014-06-04 - 2014-06-05.
  • Academic lecture
    Zha, Min; Li, Yanjun; Mathiesen, Ragnvald; Bjørge, Ruben; Roven, Hans Jørgen. (2014) Influence of Mg content, grain size and strain rate on mechanical properties and deformation behaviors in Al-Mg alloys processed by ECAP and annealing. ICAA 2014 . NTNU; 2014-06-15 - 2014-06-19.

2013

  • Academic lecture
    Høydalsvik, Kristin; Fløystad, Jostein Bø; Zhao, Tiejun; Esmaeili, Morteza; Diaz, Ana; Andreasen, Jens Wenzel; Mathiesen, Ragnvald; Rønning, Magnus; Breiby, Dag Werner. (2013) In situ coherent X-ray diffractive imaging of CO2-storing nanoparticles. Norwegian PhD Network on Nanotechnology for Microsystems; 4th annual workshop ; Bergen. 2013-06-17 - 2013-06-19.
  • Academic lecture
    Høydalsvik, Kristin; Fløystad, Jostein Bø; Mathiesen, Ragnvald; Rønning, Magnus; Breiby, Dag Werner. (2013) Using X-rays for investigating nanoscale particles and structures. Invited guest lecture at ESRF, Grenoble. ; ESRF, Grenoble. 2013-10-09.
  • Academic lecture
    Mathiesen, Ragnvald. (2013) New opportunities in material science - Fast kinetics and mesoscale structure dynamics seen with a new source. ESRF User Meeting - Work Shop Material Science and Chemistry . European Synchrotron Radiation Facility; Grenoble. 2013-02-04 - 2013-02-06.
  • Academic lecture
    Mathiesen, Ragnvald. (2013) Synchrotron X-ray imaging for the study of solidification in metallic alloys. The II International Baltic School on Methods and Instruments of the X-ray investigation . The Immanuel Kant Baltic Federal University; Kaliningrad. 2013-10-03 - 2013-10-07.
  • Academic lecture
    Mathiesen, Ragnvald. (2013) Time-resolved X-ray diffraction and imaging studies of liquid->solid phase transformation. Instituttseminar . Institutt for fysikk, DTU; København/Lyngby. 2013-11-14 - 2013-11-14.
  • Academic lecture
    Zha, Min; Li, Yanjun; Mathiesen, Ragnvald; Bjørge, Ruben; Roven, Hans Jørgen. (2013) Development of an Al-7Mg alloy with a high strength and good ductility by ECAP. 5th International Conference on Recrystallization & Grain Growth 2013 ; 2013-05-05 - 2013-05-10.

2012

  • Academic lecture
    Fløystad, Jostein Bø; Esmaeili, Morteza; Böttiger, Arvid P.L.; Høydalsvik, Kristin; Diaz, Ana; Mathiesen, Ragnvald; Rønning, Magnus; Andreasen, Jens Wenzel; Breiby, Dag Werner. (2012) Lensless X-Ray Imaging in Non-Ambient Conditions for Materials Science. Norwegian Synchrotron and Neutron User Meeting 2012 ; Sola, Rogaland. 2012-01-30 - 2012-01-31.
  • Academic lecture
    Fløystad, Jostein Bø; Esmaeili, Morteza; Høydalsvik, Kristin; Diaz, Ana; Mathiesen, Ragnvald; Rønning, Magnus; Andreasen, Jens Wenzel; Breiby, Dag Werner. (2012) In Situ Lensless X-ray Microscopy in Material Science. "SCANDEM", Annual Meeting of the Nordic Microscopy Society ; Bergen. 2012-06-13.
  • Academic lecture
    Fløystad, Jostein Bø; Esmaeili, Morteza; Høydalsvik, Kristin; Diaz, Ana; Mathiesen, Ragnvald; Rønning, Magnus; Breiby, Dag Werner. (2012) In Situ X-ray Coherent Diffractive Imaging. 7th International Conference on the Physical Properties and Application of Advanced Materials ; Trondheim. 2012-06-18.
  • Academic lecture
    Fløystad, Jostein Bø; Esmaeili, Morteza; Høydalsvik, Kristin; Mathiesen, Ragnvald; Andreasen, Jens Wenzel; Rønning, Magnus; Breiby, Dag Werner. (2012) Towards 3D imaging of working catalyst nanoparticles. HYBRIS: HYbrid Beamline for In Situ 3D Resonant Imaging and Spectroscopy . Øresund Materials Innovation Community; Technical University of Denmark (DTU). 2012-12-12 - 2012-12-12.
  • Academic lecture
    Darlapudi, A; Felberbaum, M; Mathiesen, Ragnvald; Dahle, Arne Kristian. (2012) The Influence of Cu on Eutectic Nucleation and Morphology in Hypoeutectic Al-Si Alloys. ICAA13: 13th International Conference on Aluminum Alloys ; 2012-07-03 - 2012-07-07.
  • Academic lecture
    Mathiesen, Ragnvald. (2012) Solidification microstructure formation and evolution in eutecetics studied by time-resolved X-ray imaging. Hero-M 2012 . KTH, Stockholm; Skepparholmen. 2012-05-23 - 2012-05-24.
  • Academic lecture
    Mathiesen, Ragnvald. (2012) Synchrotron radiation as a tool in material science and engineering. Leading Edges in Welding - Summer School in Modelling of Welding . TWI Ltd; Granta Park, Cambridge. 2012-07-30 - 2012-08-02.
  • Academic lecture
    Mathiesen, Ragnvald; Arnberg, Lars. (2012) X-radiographic video microscopy studies of alloy solidification processes. Norwegian Synchrotron and Neutron User Meeting . Norsk Forskningsråd - SYNKNØYT-PROG; 2012-01-30 - 2012-01-31.
  • Academic lecture
    Mirihanage, Wajira; Arnberg, Lars; Mathiesen, Ragnvald. (2012) In-situ observation of transient columnar dendrite growth in the presence of thermo-solutal convection. MCWASP XIII . Univ. Loeben; Schladming. 2012-06-17 - 2012-06-22.
  • Academic lecture
    Murphy, Andrew G; Browne, David; Mirihanage, Wajira; Mathiesen, Ragnvald. (2012) Real time in-situ observations of equiaxed dendrite coherency in al-cu alloys using high brilliance 3rd generation synchrotron sources. TMS Annual Meeting . TMS; Orlando. 2012-03-11 - 2012-03-15.
  • Academic lecture
    Reinhart, G; Nguyen-Thi, H; Bogno, A; Billia, B; Houltz, Y; Loth, K; Voss, D; Verga, A; de Pascale, F; Mathiesen, Ragnvald; Zimmermann, Gerhard. (2012) X-RAY RADIOGRAPHIC OBSERVATION OF DIRECTIONAL SOLIDIFICATION UNDER MICROGRAVITY: XRMON-GF EXPERIMENTS ON MASER12 SOUNDING ROCKET MISSION. TMS Annual Meeting . TMS; San Antonio, Texas. 2012-03-11 - 2012-03-15.
  • Poster
    Zha, Min; Li, Yanjun; Mathiesen, Ragnvald; Roven, Hans Jørgen; Bjørge, Ruben. (2012) Annealing response and strengthening mechanisms of an Al-7,5Mg alloy processed by ECAP. TMS Annual Meeting 2012 . TMS; Orlando, Florida. 2012-03-11 - 2012-03-15.
  • Academic lecture
    Zha, Min; Li, Yanjun; Mathiesen, Ragnvald; Roven, Hans Jørgen; Bjørge, Ruben. (2012) Annealing response and strengthening mechanisms of an Al-7Mg alloy processed by ECAP. Nasjonal Konferanse for Materialteknologi, Sommermøte 2012 . Norsk Metallurgisk Selskap; Trondheim. 2012-05-09 - 2012-05-10.

2011

  • Poster
    Høydalsvik, Kristin; Esmaeili, Morteza; Fløystad, Jostein Bø; Granlund, Håvard; Buset, Ole Tore; Mathiesen, Ragnvald; Breiby, Dag Werner. (2011) GAXS – a multipurpose instrument for X-ray scattering experiments. GISAXS 2011 . HASYLAB / DESY; HASYLAB. 2011-10-10 - 2011-10-12.
  • Poster
    Fløystad, Jostein Bø; Høydalsvik, Kristin; Mathiesen, Ragnvald; Rønning, Magnus; Breiby, Dag Werner. (2011) In situ X-ray imaging of catalyst nanoparticles. HERCULES 2011 ; 2011-03-18 - 2011-03-18.
  • Poster
    Høydalsvik, Kristin; Buset, Ole Tore; Mathiesen, Ragnvald; Breiby, Dag Werner. (2011) General Angle X-ray Scattering (“GAXS”) – a multipurpose instrument for X-ray scattering experiments. 6th Annual NTNU NanoLab Meeting . NTNU NanoLab; 2011-11-16 - 2011-11-16.
  • Academic lecture
    Mathiesen, Ragnvald. (2011) Studies of solidification microstructure evolution in metals by synchrotron experiments. Metallurgmøtet, Stockholm 2011 . Jernverkskontoret; KTH Stockholm. 2011-01-19 - 2011-01-20.
  • Academic lecture
    Mathiesen, Ragnvald. (2011) X-radiographic video microscopy studies of alloy solidification processes. Instituttseminar, Dept. Mat. Eng. and Mat. Sci., Univ. Queensland . Dept. Mat. Eng. and Mat. Sci., Univ. Queensland; Brisbane. 2011-05-31 - 2011-05-31.
  • Academic lecture
    Mathiesen, Ragnvald; Arnberg, Lars; Li, Yanjun; Dahle, Arne Kristian. (2011) Al-Si eutectic microstructure formation in directional solidification of Al-Si-Cu alloys. The fourth Chineese-Norwegian symposium on light metals & new energy . NTNU; Trondheim. 2011-08-24 - 2011-08-26.
  • Academic lecture
    Nguyen-Thi, H; Bogno, A; Reinhart, G; Billia, B; Mathiesen, Ragnvald; Zimmermann, Gerhard; Houltz, Y; Loth, K; Voss, D; Verga, A; de Pascale, F. (2011) XRMON-GF experimental set-up devoted to x-ray radiographic observation of directional solidification under microgravity on maser12 sounding rocket mission. 20th ESA Symposium on European Rocket & Balloon Programmes and related research ; Hyeres. 2011-05-22 - 2011-05-26.
  • Academic lecture
    Zha, Min; Li, Yanjun; Mathiesen, Ragnvald; Bjørge, Ruben; Roven, Hans Jørgen. (2011) Microstructure evolution in an UFG Al-7Mg alloy processed by ECAP during subsequent annealing. The 4th Chinese–Norwegian Symposium on Light Metals ; 2011-08-24 - 2011-08-28.

2010

  • Academic lecture
    Mathiesen, Ragnvald; Arnberg, Lars; Li, Yanjun; Dahle, Arne Kristian. (2010) In-situ X-ray video microscopy studies of Al-Si eutectic solidification. ICAA12 . Intl. Aluminium Assoc.; Yokohama. 2010-09-06 - 2010-09-09.
  • Academic lecture
    Delaleau, Pierre; Beckermann, Christoph; Mathiesen, Ragnvald; Arnberg, Lars. (2010) Mesoscopic Simulation of Directional Solidification of Al-Cu Alloys with Convection. The 2nd International Symposium on Cutting Edge of Computer Simulation of Solidification and Casting (CSSC2010) . The Iron and Steel Institute of Japan (ISIJ); Sapporo. 2010-02-03 - 2010-02-05.
  • Poster
    Fløystad, Jostein Bø; Grepstad, Sigrid; Mo, Frode; Mathiesen, Ragnvald; Tybell, Thomas; Breiby, Dag Werner. (2010) Domain size distributions in ferroelectric PbTiO3 thin films. 1st annual workshop in the Norwegian PhD Network on Nanotechnology for Microsystems ; 2010-05-29 - 2010-06-02.
  • Academic lecture
    Mathiesen, Ragnvald. (2010) Synchrotron radiation - opportunities in material science. Hero-m Summer School . Hero-m CoE/KTH; Tallberg. 2010-06-28 - 2010-07-01.
  • Academic lecture
    Mathiesen, Ragnvald; Arnberg, Lars. (2010) X-radiographic video microscopy studies of alloy solidification processes. Deutsche Physikalische Gesellschaft Spring Meeting . Deutsche Physikalische Gesellschaft; Regensburg. 2010-03-22 - 2010-03-26.
  • Academic lecture
    Mathiesen, Ragnvald; Arnberg, Lars. (2010) X-radiographic video microscopy studies of solidification processes. Work Shop - Spring-8 synchrotron, Japan . Spring-8 og Univ. Osaka; Spring-8. 2010-02-08 - 2010-02-08.
  • Academic lecture
    Mathiesen, Ragnvald; Arnberg, Lars. (2010) X-radiographic video microscopy studies of solidification processes - eutectic solidification. The 2nd International Symposium on Cutting Edge of Computer Simulation of Solidification and Casting (CSSC2010) . Iron and Steel Institute of Japan (ISIJ); Sapporo. 2010-02-03 - 2010-02-05.

2009

  • Academic lecture
    Delaleau, Pierre; Mathiesen, Ragnvald; Schaffer, Paul; Arnberg, Lars; Beckermann, Christoph. (2009) Modeling and in-situ X-ray video microscopy of confined equiaxed grain growth and buoyant motion in Al-Cu. Modelling of Casting, Welding and Advanced Solidification Processes, MCWASP XII ; Vancouver. 2009-06-07 - 2009-06-14.
  • Academic lecture
    Delaleau, Pierre; Mathiesen, Ragnvald; Schaffer, Paul; Bellmann, Martin; Arnberg, Lars. (2009) Impact of confinement on the growth of equiaxed grains in Al-Cu during X-ray radiography. TMS2009 . The Minerals, Metals & Materials Society (TMS); San Francisco. 2009-02-15 - 2009-02-19.
  • Academic lecture
    Mathiesen, Ragnvald. (2009) In situ X-ray videomicroscopy on evolving alloy solidification microstructures. Instituttseminar . Computational Material Science, EPFL; Lausanne. 2009-07-01.
  • Academic lecture
    Mathiesen, Ragnvald. (2009) Microstructure evolution and fundamental characteristics in solidification of metals and alloys - a comparison of modelling and experiments. TMS2009 . The Mineral, Metals & Materials Society (TMS); San Francisco. 2009-02-15 - 2009-02-19.
  • Academic lecture
    Mathiesen, Ragnvald; Arnberg, Lars. (2009) In situ X-ray videomicroscopy on evolving solidification microstructures in eutectic alloys. Insitituttseminar . Risø DTU Dept. of Materials Research; Risø DTU. 2009-12-15 - 2009-12-15.
  • Academic lecture
    Mathiesen, Ragnvald; Arnberg, Lars. (2009) Real-time X-ray imaging of diffusive and convective mass transport in alloy solidification processing. MaxLab User Meeting . Max Lab; Lund. 2009-11-02 - 2009-11-04.

2007

  • Academic lecture
    Mathiesen, Ragnvald. (2007) Solidification Processing of Metals studied by in-situ X-ray video microscopy. Instituttseminar . Inst. National Polytech. Grenoble; Grenoble. 2007-11-05 - 2007-11-05.
  • Academic lecture
    Mathiesen, Ragnvald. (2007) Solidification Processing of Metals studied by in-situ X-ray video microscopy. MaxLab User Meeting and MaxLabIV Work shop . MaxLab; Lund. 2007-10-29 - 2007-10-31.
  • Academic lecture
    Mathiesen, Ragnvald. (2007) Solidification Processing of Metals studied by in-situ X-ray video microscopy. Instituttseminar . Dept. of Material Science, Univ. Queensland; Brisbane. 2007-10-18 - 2007-10-18.
NTNU
Studies
  • Master's programmes in English
  • For exchange students
  • PhD opportunities
  • Courses
  • Career development
  • Continuing education
  • Application process
Contact
  • Contact NTNU
  • Employees
  • For alumni
  • Press contacts
  • Researcher support
Discover NTNU
  • Experts
  • Vacancies
  • Pictures from NTNU
  • Innovation resources
  • NTNU in Gjøvik
  • NTNU in Trondheim
  • NTNU in Ålesund
  • Maps
About NTNU
  • NTNU's strategy
  • Research excellence
  • Strategic research areas
  • Organizational chart
  • Libraries
  • About the university
Services
  • For employees
  • For students
  • Blackboard
  • Intranet

Norwegian University of Science and Technology

Use of cookies
Accessibility statement (in Norwegian)
Privacy policy
Editoral responsibility
Sign In