Multi-scale micromechanics of advanced alloys
Research Seminar Series
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Date
11 Sep 2025
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Organiser
Department of Industrial and Systems Engineering, PolyU
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Time
10:00 - 11:30
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Venue
BC402
Speaker
Dr Yilun Xu
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Summary
Advanced alloys have been extensively applied in key structures and components in major sectors. The alloys, normally subjecting to multi-physics in-service scenarios, undergoes plastic deformation at micro-scale, thus develop damage, and the degradation eventually leads to the failure of structure integrity. The microstructure of alloys has been shown to predominate the plastic deformation and induced damage, and therefore it is of vital importance to establish faithful micro-mechanical model at various length scales of microstructures to understand the correlation between the microstructure and performance of alloys. The research also facilitates the safety standard of high-value components in key industry sectors in addition to the development of novel materials with desired performance.
Keynote Speaker
Dr Yilun Xu
Senior Scientist
Institute of High Performance Computing (IHPC), Agency for Science, Technology and Research (A*STAR)
Dr Yilun Xu has been working on micromechanics of advanced alloys using multi-scale approaches combing experimental techniques (EBSD, DIC, and TEM) and modelling methods (Molecular Dynamics, Discrete Dislocation Dynamics, and Crystal Plasticity Finite Element). Dr Xu’s research has been focusing on bridging the micro-scale mechanisms of deformation and damage and the macro-scale performance of alloys, which include strength, ductility, creep damage-tolerance and fatigue resistance. Dr Xu’s has participated a few grants and projects for work package PI, which were sponsored by EU and UK institutions and industry. More specifically, Dr Xu systematically investigated the microstructure effect on the performance of Pb-free solder joints, which play a pilot role in the reliability of microelectronics. The applicant has published 38 papers (29 as first or corresponding author) in high-impact journals, including Nature Communications, Journal of the Mechanics and Physics of Solids, Acta Materialia and International Journal of Plasticity. The applicant was shortlisted for the Young Researcher Award at the European Solid Mechanics Conference and serves on the Young Editorial Board of the Journal of Materials Science & Technology.
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