| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Phase Stability in Extreme Environments
|
| Presentation Title |
Dynamic Sink Strength Effects of Irradiation-induced Precipitates in Advanced Steels for Fusion Reactor Applications |
| Author(s) |
T.M. Kelsy Green, Tim Graening, Weicheng Zhong, Ying Yang, Kevin G. Field |
| On-Site Speaker (Planned) |
Tim Graening |
| Abstract Scope |
Castable Nanostructured Alloy (CNA) steels developed at Oak Ridge National Laboratory (ORNL) represent an advancement of alloy design and manufacturing for structural materials in nuclear fusion reactors. The compositions of CNAs were designed to maintain a high density of stable precipitates over a large temperature and dose range, thereby acting as sinks for irradiation point defects. This work studied two model CNAs irradiated at elevated temperature in single-effect, high-fidelity ion irradiation experiments that varied temperature, dose, dose rate, and He co-implantation rate. The competing effects of radiation-enhanced diffusion and ballistic dissolution will be discussed to understand the evolution of radiation-induced and pre-existing precipitates. Precipitate stability, composition, and coherency as a function of irradiation conditions and the effects of these parameters on sink strength will be explored. Such a systematic study helps to provide new knowledge on how each parameter impacts the microstructure, which can help to explain ion irradiation-induced phenomena. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Nuclear Materials, Phase Transformations, Iron and Steel |