Randi Holmestad
Background and activities
Dr. Holmestad (born in 1967) is professor at Dept. of Physics NTNU (since 99). Degrees: Dr. ing. (PhD) in materials physics, NTH, 1994, Siv. ing (MSc) in technical physics, NTH, 1991. Holmestad's present research interests are focussed on materials physics; transmission electron diffraction and microscopy (TEM), materials microstructure and the relation to macroscopic properties. Ongoing projects are on aluminium alloys, solar cell materials, electron diffraction and new functional materials. She has educated 19 PhD students and 70 MSc students, in addition to co-supervision of 8 PhD students. Holmestad has had several sabbaticals abroad - 6 months in 2005 and 2012, both at University of Illinois, Urbana-Champaign, IL, USA and 2 months at Monash University, Melbourne, Australia in 2019. Web of Science (Oct 2021): Cited documents = 240, Citations ~4100, h index = 35. See also Google Scholar.
She has initiated and been project leader for several externally funded projects over the past twenty years, funded mainly by the Norwegian Research Council and NOrwegian aluminium industry. In addition she has been leader of TEM Gemini Centre (SINTEF, NTNU) 2006, 2008-2013, . She was the project leader of NORTEM, Norwegian Centre of transmission electron microscopy, 2010-2013, 2017- >) a large scale infrastructure project in TEM, from SINTEF, UiO and NTNU (total project 115 MNOK, 2011-20). Since 2015 she is involved in the SFI project CASA, Centre of advanced structural analysis, and since 2021 in SFI PhysMet.
Research interests
- Electron microscopy and spectroscopy (TEM, HREM, EDS, EELS, STEM)
- Electron diffraction; Quantitative Convergent Beam electron Diffraction (CBED), Electron crystallography, scanning precession electron diffraction (SPED)
- Microstructure characterization of inorganic materials, alloys and intermetallics, precipitation in aluminium alloys, functional oxides, solar cell materials, relationships between micro/nano-structure and properties of materials, bonding
- Modelling and simulations in materials physics; Solid state calculations
Links
Courses
- FY8102 - Electron Microscopy and Diffraction
- TFY4851 - Experts in Teamwork - Aluminium - Sustainable and recycling
Scientific, academic and artistic work
A selection of recent journal publications, artistic productions, books, including book and report excerpts. See all publications in the database
2022
- (2022) Effect of Multiply Twinned Ag(0) Nanoparticles on Photocatalytic Properties of TiO2 Nanosheets and TiO2 Nanostructured Thin Films. Nanomaterials. vol. 12 (750).
- (2022) e-DREAM: the European Distributed Research Infrastructure for Advanced Electron Microscopy. Microscopy and Microanalysis. vol. 28.
- (2022) Nanostructural Analysis of Co-Re/γ-Al2O3 Fischer-Tropsch Catalyst by TEM and XRD. ChemCatChem. vol. 14.
- (2022) Edge interfaces of the Ω plates in a peak-aged Al-Cu-Mg-Ag alloy. Materials Characterization. vol. 185.
- (2022) Effect of cyclic ageing on the early-stage clustering in Al–Zn-Mg(-Cu) alloys. Materials Science & Engineering: A. vol. 846.
- (2022) Scanning Precession Electron Diffraction and What We Get Out of Such Data in Studies of Aluminium Alloys. Microscopy and Microanalysis. vol. 28.
- (2022) The Effect of Small Additions of Fe and Heavy Deformation on the Precipitation in an Al–1.1Mg–0.5Cu–0.3Si At. Pct Alloy. Metallurgical and Materials Transactions A. vol. 53 (9).
- (2022) AutomAl 6000: Semi-automatic structural labelling of HAADF-STEM images of precipitates in Al–Mg–Si(–Cu) alloys. Ultramicroscopy. vol. 236.
2021
- (2021) On intermetallic phases formed during interdiffusion between aluminium alloys and stainless steel. Intermetallics (Barking). vol. 142.
- (2021) Preliminary in-situ study of FIB-assisted method for aluminium solid-state welding at the microscale. Procedia Structural Integrity. vol. 33.
- (2021) Effect of pre-deformation on age-hardening behaviors in an Al-Mg-Cu alloy. Materials Science & Engineering: A. vol. 820.
- (2021) Data on atomic structures of precipitates in an Al-Mg-Cu alloy studied by high resolution transmission electron microscopy and first-principles calculations. Data in Brief. vol. 34 (106748).
- (2021) Precipitation processes and structural evolutions of various GPB zones and two types of S phases in a cold-rolled Al-Mg-Cu alloy. Materials & design. vol. 199.
- (2021) Enhanced mechanical properties in 6082 aluminum alloy processed by cyclic deformation. Metals. vol. 11 (11).
- (2021) Quantitative analysis of {100}Al plate/lath- and <100>Al rod-shaped precipitates in an aged Al-Cu-Mg-Si alloy using TEM. IOP Conference Series: Materials Science and Engineering. vol. 1014 (012013).
- (2021) Precipitate/matrix incompatibilities related to the {111}Al Ω plates in an Al-Cu-Mg-Ag alloy. Materials Characterization. vol. 182.
- (2021) Precipitation behavior of Al-Si-Cu-Mg(-Fe) alloys by a deformation-semisolid extrusion process. Materials Characterization. vol. 173.
- (2021) An improved modelling framework for strength and work hardening of precipitate strengthened Al–Mg–Si alloys. Materials Science & Engineering: A. vol. 832.
- (2021) Vacancy and solute co-segregated η1 interface in over-aged Al-Zn-Mg alloys. Acta Materialia. vol. 218.
- (2021) Interface Microstructure and Tensile Properties of a Third Generation Aluminium-Steel Butt Weld Produced Using the Hybrid Metal Extrusion & Bonding (HYB) Process. Materials Science & Engineering: A. vol. 809.