FEIT Research Project Database

Dislocation-twin boundary interaction in magnesium alloys

Project Leader: Christian Brandl
Collaborators: Yu-Lung Chiu (The University of Birmingham)
Primary Contact: Christian Brandl (christian.brandl@unimelb.edu.au)
Disciplines: Chemical & Biomolecular Engineering,Computing and Information Systems,Mechanical Engineering

Magnesium alloys is the most promising material system for weight-saving structural applications where their low density is critical to save energy and protect the environment by reducing CO2 emissions. A key limiting factor of the wider application of magnesium alloys is the poor room temperature formability. To improve the formability of magnesium alloys requires in-depth understanding of the elemental plastic deformation mechanisms.

To understand the detailed deformation mechanisms, atomistic modelling will be performed in Dr Christian Brandl’s group at the University of Melbourne. The focus will be on the discovery of the detailed interaction at the nanometre scale between dislocations and twin grain boundaries using High-Performance Computing. This in-silico observations will guide the experiments and predict emerging measurable phenomena. At the University of Birmingham in Dr Yu-Lung Chiu’s group the student will have access to state-of-the-art in-situ electron microscopy combined with nano and micromechanical testing.

The candidate will spend 18 months to learn and perform the atomistic simulation (based at the University of Melbourne) on dislocation twin interaction. Following that the candidate will be trained on the operation of electron microscopes and the nanomechanical characterization facilities (based at the University of Birmingham) to validate the simulation predictions. In the final year of the project, the candidate will return to Melbourne to complete the studies and write up the thesis.

It is expected that the candidate will participate international conferences (such as MRS, TMS or Gordon Research Conference) and to produce scientific journal publications to disseminate the outcomes of the project. Occasional visits to collaborating institutions may be needed subject to the project progress.

Further information: https://research.unimelb.edu.au/research-at-melbourne/priestley-scholars/joint-phd-opportunities/dislocation-twin-boundary-interaction-in-magnesium-alloys

Mg alloy