About this Abstract |
Meeting |
2024 TMS Annual Meeting & Exhibition
|
Symposium
|
Defects and Interfaces: Modeling and Experiments
|
Presentation Title |
Mechanics of Symmetric and Asymmetric Grain Boundary Migration with Phase Field |
Author(s) |
Brandon Runnels, Abhijith Thoopul Anantharanga |
On-Site Speaker (Planned) |
Abhijith Thoopul Anantharanga |
Abstract Scope |
Grain boundary (GB) migration is one of key underlying processes behind mechanisms ranging from recrystallization and solidification to work hardening. GBs have been repeatedly identified as the least understood of all material defects, a well-earned designation resulting from their wide range of behaviors over a very large configurational space. GB migration, in particular, exhibits a strong sensitivity to loading type, with a single boundary able to exhibit a wide range of behaviors under varied boundary conditions. In this work, we systematically explore the range of grain boundary migration behaviors in both well-behaved STGBs and poorly-behaved ATGBs using the "phase field disconnections" method. It is shown that disconnections arise spontaneously as a consequence of GB anisotropy and nonlinear kinetics. The effects of incompatibility in ATGB migration are also explored, and it is shown that incompatibility drives other interesting behaviors such as twinning. |
Proceedings Inclusion? |
Planned: |
Keywords |
Mechanical Properties, Modeling and Simulation, |