About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
|
Computational Thermodynamics and Kinetics
|
Presentation Title |
Expanding Insights into Disconnections |
Author(s) |
Spencer L. Thomas, Jason Trelewicz |
On-Site Speaker (Planned) |
Spencer L. Thomas |
Abstract Scope |
The Disconnection Model, which most notably explains shear-induced grain boundary migration, has ushered in a new understanding of grain boundary migration and sliding in general. However, we still only have a nascent understanding of disconnections themselves. This work reveals, via a combination of atomistic simulation and Kinetic Monte Carlo, many nuances of disconnection behavior – measuring disconnection energetics and mobility, size and doping effects, the effect of metastable grain boundary structures, and the behavior of disconnections on faceted asymmetric tilt grain boundaries. In particular, shear-coupled migration can be induced by differences in disconnection mobility rather than energetics; this can introduce sharp temperature dependence on grain boundary migration and sliding behavior. |
Proceedings Inclusion? |
Planned: |
Keywords |
Computational Materials Science & Engineering, Modeling and Simulation, Other |