About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
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Symposium
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Transmutation Effects in Fusion Reactor Materials: Critical Challenges & Path Forward
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Presentation Title |
The Effects of High-dose He and H Ion Implantation on the Microstructural Development in EUROFER-ODS Steel |
Author(s) |
Olga Emelyanova, Aurelie Gentils, Katia March, Yuriy N. Yagodzinskyy, Vladimir A. Borodin, Pavel S. Dzhumaev, Pavel V. Vladimirov |
On-Site Speaker (Planned) |
Aurelie Gentils |
Abstract Scope |
Microstructural evolution in ODS-EUROFER steel caused by ion implantation of high doses of helium and hydrogen, both separately and in combination, was studied by conventional TEM supported by EELS and thermal desorption analysis. The observations are consistent with the known trend that oxide nanoparticles are efficient nucleation sites for helium bubbles. However, contribution of bubbles associated with oxide particles to the total swelling is relatively minor as compared bubbles on other structural defects. In contrast to helium, hydrogen has little effect on the overall swelling in all implantation conditions used. However, considerable increase of hydrogen uptake was observed for both helium-free and helium pre-implanted sample of ODS-EUROFER as compared to EUROFER97. The only detectable effects of hydrogen implantation in helium pre-implanted ODS-EUROFER are rounding of facetted bubbles and trapping of hydrogen atoms at cavity walls. A mechanism of hydrogen accumulation at helium bubbles is proposed based on the accumulated data. |
Proceedings Inclusion? |
Planned: |
Keywords |
Iron and Steel, Nuclear Materials, Characterization |