| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in Bcc-Superalloys
|
| Presentation Title |
High-Temperature Evolution of Irradiation Defects in WTaCrV Refractory High-Entropy Alloy for Nuclear Fusion Applications |
| Author(s) |
Damian Kalita, Iwona Jóźwik, Katarzyna Mulewska, Amin Esfandiarpour, Łukasz Kurpaska, Yanwen Zhang, William J. Weber, Jacek Jagielski |
| On-Site Speaker (Planned) |
Damian Kalita |
| Abstract Scope |
We fabricated the equimolar WTaCrV refractory high entropy alloy for nuclear fusion applications. The material was subjected to an in-depth study of its microstructure as well as mechanical behavior. To investigate its irradiation behavior, the material was subjected to room temperature He-ion irradiation to introduce He-induced structural defects. The high-temperature evolution of these defects was studied using the in-situ heating TEM method. We found that the He-bubbles formed during He-irradiation were stable up to 800°C. However, with increasing temperature up to 1000°C, the bubbles agglomerated through migration and coalescence. Nevertheless, even at this temperature, the size of the bubbles was significantly smaller in comparison to conventional fusion materials, indicating the promising irradiation resistance of the alloy. Using molecular dynamics (MD), we found that the low tendency of the irradiation defects for high-temperature agglomeration is associated with the low diffusivity of vacancies within the structure of the WTaCrV alloy. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
High-Entropy Alloys, Nuclear Materials, High-Temperature Materials |