| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Phase Stability in Extreme Environments II
|
| Presentation Title |
Exploring and Quantifying Degradation Mechanisms in Irradiated Structural Materials |
| Author(s) |
Steven J. Zinkle, Qinyun Chen, Zehui Qi, Ryan Thier, Emily R. Proehl, Samara Levine, Yajie Zhao, Yan-Ru Lin |
| On-Site Speaker (Planned) |
Steven J. Zinkle |
| Abstract Scope |
Structural materials for next-generation fission and proposed fusion reactors need to satisfactorily operate under extreme particle irradiation doses along with high temperatures and stresses. Improved understanding of degradation mechanisms in these coupled extreme environments is needed to provide the foundation for design and fabrication of the next generation of high-performance phase-stable structural materials. In particular, different types of precipitates exhibit widely different phase stability under particle irradiation. This presentation will summarize recent results on the stability of carbide, nitride, oxide, gamma prime, and alpha-prime (Cr-enriched) precipitates in ferritic/martensitic steels, Fe-Cr alloys, nickel alloys, and austenitic steels following particle irradiation at a wide range of temperatures, knock-on energies, doses and dose rates. The competing mechanisms of ballistic dissolution and precipitate renucleation and growth assisted by radiation enhanced diffusion are crucial for determining overall precipitate stability. Potential mechanisms responsible for high temperature helium embrittlement of grain boundaries will also be discussed. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Characterization, Nuclear Materials, |