About this Abstract |
Meeting |
2024 TMS Annual Meeting & Exhibition
|
Symposium
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Chemistry and Physics of Interfaces
|
Presentation Title |
Stick-slip Solute Impairment of non-Arrhenius Boundary Migration in Incoherent Twins |
Author(s) |
Eric R. Homer, Akarsh Verma, Oliver K Johnson, Gregory B Thompson, Shigenobu Ogata |
On-Site Speaker (Planned) |
Eric R. Homer |
Abstract Scope |
Migration of incoherent twins is unique in comparison with other grain boundaries because some incoherent twins migrate at relatively high velocities and don’t follow expected Arrhenius temperature dependence. This antithermal behavior, slower migration at higher temperatures, can emerge from a combination of thermally activated processes. In recent work, we have observed that at high solute content and low driving forces, the fast, non-Arrhenius migration is frustrated. Under these conditions, the boundaries exhibit stick-slip behavior and may signal an important transition that occurs at low driving forces, as shown by other recently published work. The solute clearly impacts the migration behavior but we do not observe drag of the solute with the boundary as it migrates or even a change in atomic motions. This transition may have important implications for understanding non-Arrhenius boundary and cryogenic boundary migration. |
Proceedings Inclusion? |
Planned: |
Keywords |
Computational Materials Science & Engineering, Modeling and Simulation, Thin Films and Interfaces |