About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
|
Symposium
|
Materials Systems for the Future of Fusion Energy
|
Presentation Title |
Synergies between H and He in Radiation-induced Swelling of Candidate Fusion Blanket Materials |
Author(s) |
Logan Clowers, Zhijie Jiao, Gary S. Was |
On-Site Speaker (Planned) |
Gary S. Was |
Abstract Scope |
The synergistic effect of H and He on radiation-induced swelling was studied on alloys F82H, Fe8Cr2W - a high purity analog of F82H, and CNA3, a castable nanostructured alloy. Single beam (Fe2+), dual beam (Fe2+/He2+ and Fe2+/H+), and triple beam (Fe2+/He2+/H+) irradiations were conducted over the temperature range 400-550°C to 50 dpa at a rate of 1 x 10-3 dpa/s with He and H injection rates of 10 and 40 appm/dpa, respectively. Post-irradiation characterization via bright field TEM and high-angle annular dark-field STEM was performed on all irradiated conditions to characterize the cavity size distribution and determine the effects of H/He injection on cavity microstructure. In all three alloys, hydrogen co-injection with helium led to an increase in swelling over that from helium injection alone, and to varying degrees depending on the alloy. Results will be presented in light of the role of hydrogen in increasing cavity growth and swelling. |
Proceedings Inclusion? |
Planned: |
Keywords |
Characterization, Nuclear Materials, High-Temperature Materials |