| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Meeting Materials Challenges for the Future of Fusion Energy
|
| Presentation Title |
Radiation Effects Challenges in High-Performance Materials |
| Author(s) |
Steven J. Zinkle, Siwei Chen, Yajie Zhao, Zehui Qi, Sydney Copp, Ethan Payne |
| On-Site Speaker (Planned) |
Steven J. Zinkle |
| Abstract Scope |
Fusion energy will create extreme environmental conditions in terms of high heat and particle fluxes for plasma facing materials and pronounced radiation damage due to energetic neutron bombardment in the first wall and blanket structural materials. Three major radiation damage degradation processes are low temperature hardening and embrittlement, intermediate temperature cavity swelling, and high temperature He embrittlement (HTHE) of grain boundaries. Another important consideration is precipitate stability during irradiation. The temperature-dependent hardening contributions from dislocation loops, cavities and precipitates in various alloys will be compared. The importance of intermediate He/dpa values (near fusion-relevant environmental conditions) on accelerating cavity swelling will be discussed. The important role of dislocation generation (due to plastic creep deformation) on enhanced transport of He-vacancy clusters to grain boundaries will be analyzed to quantify its effect on HTHE. Recent exploratory radiation effects studies on complex, concentrated alloys (CCAs) and ultra high temperature ceramics will be presented. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Nuclear Materials, Characterization, High-Temperature Materials |