About this Abstract |
| Meeting |
Materials in Nuclear Energy Systems (MiNES) 2025
|
| Symposium
|
Materials in Nuclear Energy Systems (MiNES) 2025
|
| Presentation Title |
The Hydrogen Effect on Swelling in F82H Revealed by Shuttered Triple-Ion Irradiation |
| Author(s) |
Zhexian Zhang, Smeet Patel, Logan Clowers, Charlie Hirst, Michael Short, Lauren Garrison, Gary Was |
| On-Site Speaker (Planned) |
Zhexian Zhang |
| Abstract Scope |
Structural materials exposed to neutron irradiation will transmute hydrogen and helium. These gas atoms will enhance the swelling at the elevated temperature operation. To study the effect of hydrogen on He-driven swelling, the University of Michigan developed a novel shutter system that creates multiple regions of different implantation concentrations through one irradiation experiment. Systematic studies were performed on a candidate fusion power plant structural alloy, F82H, irradiated under shuttered hydrogen and helium gas implantation, with 5 MeV Fe2+ ion beam at 500 degrees Celsius to 50 dpa. The shuttered irradiation created gradient region of gas doses from 0 H to 80 H and 2 He to 10 He (appm/dpa). The cavities in each region were characterized by TEM/STEM method. Inhomogeneity of cavity formation was found strongly affected by grain boundaries and precipitates. Quantitative analysis of their size distribution was performed by both human counting and AI auto-detection. The results showed that though helium will enhance the forming of bubbles, the excessive hydrogen with higher H/He ratio, will suppress the growth of cavity. |
| Proceedings Inclusion? |
Undecided |