About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Transmutation Effects in Fusion Reactor Materials: Critical Challenges & Path Forward
|
| Presentation Title |
Synergistic Effects between Radiation Damage and H/He Co-Injection on Swelling in Candidate Fusion Structural Materials |
| Author(s) |
Logan Nicholas Clowers, Gary Was, Zhijie Jiao |
| On-Site Speaker (Planned) |
Gary Was |
| Abstract Scope |
The effects of transmutation gasses H/He on the evolution of radiation-induced cavities were investigated in three RAFM steels: F82H, CNA3, and an Fe8Cr2W model alloy. A series of dual beam (Fe2++He2+) and triple beam (Fe2++He2++H+) ion irradiations were performed at 500°C while systematically varying damage level (50, 100, 150 dpa), damage rate (3x10-4, 1x10-3, 3x10-3 dpa/s), and gas injection rate (0/10, 40/10, 80/10 appm/dpa of H/He) to understand the synergisms between H, He and radiation damage. Post-irradiation characterization was done via bright-field TEM and high-angle annular dark field STEM on cross-sectional FIB lamella to determine the effects of single-parameter variations on the cavity microstructure. To understand the mechanisms by which this synergy serves to enhance swelling, 2D EELS maps were taken around cavities to attempt to determine the locations of H and He at these features. Presented results will shed light on the role of hydrogen in increasing cavity growth. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Nuclear Materials, Characterization, Iron and Steel |