About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Chemistry and Physics of Interfaces
|
| Presentation Title |
The Effect of Grain-Scale Elastic Constraints on Migration of Special and General Grain Boundaries |
| Author(s) |
Ethan R. Cluff, Eric R. Homer |
| On-Site Speaker (Planned) |
Ethan R. Cluff |
| Abstract Scope |
Grain boundary (GB) migration in polycrystals is influenced by various factors, including temperature, driving force, boundary character, defects, and constraints imposed by polycrystalline systems. Molecular dynamics studies in bicrystals routinely investigate the role of the first three factors. This study extends these efforts by investigating grain-scale elastic constraints present in polycrystalline systems. The method introduces an elastic restoring force (related to grain size) in response to lateral motion induced by shear coupling. In a sampling of 20 special and general GBs, the constraints lead to a variety of responses, including shear coupled mode switching or a complete cessation of migration. The constraints leave mobility largely unaffected in some GBs, but in others, mobility is significantly reduced, particularly at low temperatures and driving forces. Transitions in GB migration under this combination of conditions are identified and discussed. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Computational Materials Science & Engineering, Modeling and Simulation, Thin Films and Interfaces |