About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Interrelated Extremes in Materials Degradation for Fission and Fusion Environments
|
| Presentation Title |
Design Kinetic Parameters for Improved Resilience of Materials Under Irradiation |
| Author(s) |
Mohammad Nahavandian, Eda Aydogan, Jesper Byggmästar, Matheus A Tunes, Osman El-Atwani, Enrique Martinez |
| On-Site Speaker (Planned) |
Mohammad Nahavandian |
| Abstract Scope |
HEAs have captured much attention in recent years due to their conceivably improved radiation resistance compared to pure metals, terminal solid solution alloys and traditional nuclear materials. In this study, we develop criteria to design HEAs with improved radiation resilience, taking into consideration defect properties to promote interstitial-vacancy recombination. We conducted rate theory calculations on defects, followed by Molecular Dynamics simulations on pure W and W-based multicomponent concentrated alloys. It is found that when the diffusion coefficients for single vacancies and interstitials become similar and the effective migration energies of defects are minimum (maximum diffusivities), defect recombination becomes optimal, and the concentration of defects is significantly reduced. This is supported by MD simulations indicating improved radiation resistance of V- and Cr-based alloys. Also, experimental observations reinforce the proposed approach. This study sheds light on the design criteria for improved radiation resistance and helps material selection without the extensive experimental work. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
High-Entropy Alloys, Nuclear Materials, High-Temperature Materials |