Background and activities
About me in general:
I grew up in a small town in the southern part of Denmark. During my last year at high school I was participating in a project between the school and the local industry. I ended up spending two weeks at a Hydro Aluminium plant where I discovered “the magic universe” of metals. In 2002 I moved to Trondheim and commenced my Masters in Materials Science and Engineering. I finished my Masters degree in spring 2007 and started as a PhD candidate at SIMLab in September 2007. After finishing my PhD I worked at the independent research organization SINTEF Materials and Chemistry from 2011-2014 before I became Associated Professor at Department of Materials Science and Engineering at NTNU.
My main research area of interest is understanding and modelling of the interplay between thermo-mechanical processing, microstructure and mechanical properties of metallic materials, mainly steel and aluminium. The scale ranges from nanoscale (precipitates and particles) through micro scale (grain structure) to macro scale (final products/structures). Chemical composition, processing technique and heat treatments affects the microstructure through phase transformation, precipitation of wanted or unwanted particles and texture, which again have a great influence on performance of the end product with respect to strength, ductility, corrosion and fracture behaviour. The materials of interests are primarily, but not limited to, steel and aluminium.
Subject of my PhD:
Work- and age-hardening of 7xxx aluminium alloys
The objective of my work is to gain knowledge about the work- and age hardening mechanisms in heat treatable aluminium alloys by use of metallurgical characterization of the material subjected to typical industrial artificial ageing. The experimental data is to be used for validation and further development of already existing models for predicting microstructure and mechanical properties.
The experimental work will be limited to the 7xxx alloying series where four representative industrial 7xxx alloys have been chosen. Plastically deformed materials such as extruded profiles are usually affected by texture due to the forming process, i.e. the material becomes anisotropic. To elude this effect the experimental study will at first be based on as-cast material to investigate the relationship between precipitation and mechanical properties. Later on extruded profiles will also be a part of the study to understand the effect of work hardening on the precipitation kinetics.
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
- (2018) Influence of Stacking Sequence and Intermediate Layer Thickness in AA6082-IF Steel Tri-Layered Cold Roll Bonded Composite Sheets. Key Engineering Materials. vol. 767.
- (2018) Microstructure Evolution in Super Duplex Stainless Steels Containing σ-Phase Investigated at Low-Temperature Using In Situ SEM/EBSD Tensile Testing. Metals. vol. 8 (7).
- (2017) Effect of microstructure on the corrosion resistance of duplex stainless steels: Materials performance maps. International Corrosion Conference Series. vol. 8.
- (2017) The effect of alloying elements on the ductility of Al-Mg-Si alloys. Materials Science & Engineering: A. vol. 693.
- (2017) The Effect of Heating Rate on the Density and Spatial Distribution of Dispersoids during Homogenisation of 6xxx Aluminium Alloys. Materials Science Forum. vol. 877.
- (2016) The Effect of Sample Preparation on Quantification of Retained Austenite in Supermartensitic Stainless Steel Studied by EBSD and XRD. ISOPE - International Offshore and Polar Engineering Conference. Proceedings.
- (2016) Work-hardening and ductility of artificially aged AA6060 aluminium alloy. Mechanics of materials (Print). vol. 97.
- (2015) Permanent effect of a cryogenic spill on fracture properties of structural steels. IOP Conference Series: Materials Science and Engineering. vol. 102.
- (2015) Influence of microstructure on work-hardening and ductile fracture of aluminium alloys. Materials & Design. vol. 70.
- (2015) Crystal plasticity finite element simulations of pure bending of aluminium alloy AA7108. International Journal of Material Forming. vol. 9 (4).
- (2014) Influence of processing route on the work-hardening and ductile fracture of an AA6060 aluminium alloy. Materials Science Forum. vol. 794-796.
- (2014) The effect of elastic straining on a 6060 Aluminium alloy during natural or artificial ageing. Materials Science Forum. vol. 794-796.
- (2014) Mechanical behaviour of an AA6082 aluminium alloy at low temperatures. Materials Science Forum. vol. 794-796.
- (2014) Effects of particles and solutes on strength, work-hardening and ductile fracture of aluminium alloys. Mechanics of materials (Print). vol. 79.
- (2013) Failure of aluminium self-piercing rivets: An experimental and numerical study. Materials & Design. vol. 49.
- (2013) Impact against X65 steel pipes - An experimental investigation. International Journal of Solids and Structures. vol. 50 (20-21).
- (2013) An experimental study on the deformation and fracture modes of steel projectiles during impact. Materials & Design. vol. 51.
- (2012) Effect of quenching rate on microstructure and mechanical properties of commercial AA7108 aluminium alloy. Transactions of Nonferrous Metals Society of China. vol. 22 (8).
- (2012) Effect of alloying elements on stage-III work-hardening behaviour of Al-Zn-Mg(-Cu) alloys. International Journal of Materials Research - Zeitschrift für Metallkunde. vol. 103 (5).
- (2011) Three-Point Bending of Heat-Treatable Aluminum Alloys: Influence of Microstructure and Texture on Bendability and Fracture Behavior. Metallurgical and Materials Transactions. A. vol. 42A (11).