About this Abstract |
| Meeting |
2027 TMS Annual Meeting & Exhibition
|
| Symposium
|
Transmutation Effects in Materials in Fission, Fusion, and Spallation Environments
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| Presentation Title |
Influence of Rhenium Alloying and Potassium Doping on Hydrogen Isotope Behavior in Neutron-Irradiated Tungsten |
| Author(s) |
Emily H. Mang, Kailee Collins, Calvin R. Lear, Brian Wirth, Akira Hasegawa, Weicheng Zhong |
| On-Site Speaker (Planned) |
Emily H. Mang |
| Abstract Scope |
Plasma-facing materials (PFMs) will be subjected to continuous neutron irradiation and hydrogen isotope bombardment during service. While the effects of neutron irradiation are well studied, understanding their coupled interactions with hydrogen isotope exposure is essential for evaluating fusion reactor environments, as irradiation-induced defects and transmutation products can alter hydrogen transport by introducing trapping sites. Tungsten (W), a leading PFM candidate due to its exceptional thermophysical properties, also exhibits inherently low hydrogen isotope retention, helping to manage tritium inventory. Alloying strategies used to improve recrystallization resistance, including rhenium (Re) additions and potassium (K) doping, enhance the high-temperature stability of W, but their influence on hydrogen retention following irradiation remains largely unknown. This work investigates deuterium retention and permeation in pure W, K-doped W, and W-3 wt.% Re neutron irradiated at 850-1100°C and correlates the results with microstructural characterization to clarify the roles of irradiation-induced defects and transmutation-driven precipitation in deuterium trapping. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Nuclear Materials, Environmental Effects, Characterization |