About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Materials Kinetics and Mechanisms Under External Forcing-Driven Conditions
|
| Presentation Title |
Grain Boundary Structural Transformations Under Extremes |
| Author(s) |
Fadi Abdeljawad, Daniel Moore, Enze Chen, Timofey Frolov |
| On-Site Speaker (Planned) |
Fadi Abdeljawad |
| Abstract Scope |
Materials interfaces critically influence the properties of engineering materials in applications ranging from nanodevices to structural components in extreme environments. Recent experiments revealed GB phases in a wide range of materials systems. However, GB transformation dynamics remain largely unexplored especially in conditions where GBs serve as sources/sinks of point defects. Here, we employ atomistic simulations to investigate GB structural transformation and phase evolution of twist boundaries in Tungsten. We observe a spontaneous transformation of a twist GB into coexistent GB phases with distinct dislocation networks. At elevated temperatures, these GB phases undergo coarsening in which their characteristic feature size increases with time. Atomistic simulations employing the synthetic driving force reveal a strong correlation between GB phase evolution and high temperature boundary dynamics. These simulation results challenge our current understanding of GB dynamics under extremes. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Thin Films and Interfaces, Computational Materials Science & Engineering, Phase Transformations |