About this Abstract |
Meeting |
2024 TMS Annual Meeting & Exhibition
|
Symposium
|
Computational Thermodynamics and Kinetics
|
Presentation Title |
Unusual Grain Boundary Stagnation Revealed by Atomistic Simulations |
Author(s) |
Xinyuan Song, Chuang Deng |
On-Site Speaker (Planned) |
Xinyuan Song |
Abstract Scope |
Grain boundary (GB) migration plays a crucial role in the dynamic behavior and evolution of polycrystalline materials. In this report, we present a notable finding of GB stagnation observed during our simulations when subjecting specific types of bicrystals to high driving forces. This phenomenon deviates from the well-documented continuous GB migration under a constant driving force, as commonly reported in the literature, as well as the previously observed stick-slip GB migration behavior. We believe this newfound phenomenon may have some link to the experimentally observed stagnation of grain growth in polycrystals. Our further simulation suggests that subtle dynamic microstructural changes occurring during GB migration may result in the GB becoming trapped in an energy well. This finding aligns with recent in-situ experimental observations demonstrating the occurrence of dynamic microstructural evolution within GBs during their migration. |
Proceedings Inclusion? |
Planned: |
Keywords |
Computational Materials Science & Engineering, Copper / Nickel / Cobalt, Other |