About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advanced Characterization Techniques for Quantifying and Modeling Deformation
|
| Presentation Title |
Dislocation Mobility in FeCr Alloys: Stress Correlation Effects in Discrete Dislocation Dynamics Simulations |
| Author(s) |
Hyunsoo Lee, Enrique Saez Martinez |
| On-Site Speaker (Planned) |
Hyunsoo Lee |
| Abstract Scope |
FeCrAl alloy is a promising candidate for nuclear fuel cladding applications due to its high-temperature oxidation resistance and mechanical robustness. Consequently, there is significant interest in modeling the alloy’s crystal plasticity. While molecular dynamics (MD) simulations have been widely used to study dislocation mobility laws, their computational constraints restrict the scope of such investigations. In this work, we quantify the effective mobility in a random FeCr BCC solid solution using a locally fluctuating noise field. This time-independent noise introduces stress barriers into the governing equation—a method proven effective for modeling solid-solution strengthening. By leveraging MD-derived correlation trends, we sample the noise field and integrate it into our DDD simulations. Our multi-scale approach, combining MD with mesoscale simulations, reveals previously unexplored insights into dislocation mobility. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Computational Materials Science & Engineering, ICME, Modeling and Simulation |