| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Chemistry and Physics of Interfaces
|
| Presentation Title |
Mesoscale Mechanics of Grain Boundary Disconnections and Shear Coupling |
| Author(s) |
Brandon Runnels, Yang Hu, Dennis Kochmann |
| On-Site Speaker (Planned) |
Brandon Runnels |
| Abstract Scope |
Grain boundary (GB) migration plays a crucial role in processes such as recrystallization, solidification, and work hardening. GBs are often considered the least understood material defects due to their diverse behaviors across a vast configuration space, an attribution that is particularly appropriate when considering their highly complex migration behavior. Disconnections, which are generally accepted to be the fundamental mediator of GB migration, have been predominantly studied using atomistic and crystallographic techniques. Here, we discuss a phase field method that predicts the emergence of disconnection as well as complex boundary migration behavior such as twinning. We also present the application of this method to the problem of disconnection-mediated twin growth in magnesium, for which the phase field method produces remarkably good agreement when compared to atomistic simulations. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Computational Materials Science & Engineering, |