Quantitative assessment of Ni⁺ and He⁺ ion irradiation damage in a tungsten heavy alloy under the simulated nuclear fusion environment.

ABSTRACT: A 90W-7Ni-3Fe (wt.%) tungsten heavy alloy has been sequentially Ni⁺ and He⁺ ion irradiated at 700 °C to simulate the high temperature irradiation environment of a fusion reactor interior. W/Ni-Fe-W dual-phase alloys have been proposed to serve as plasma facing materials and require detailed investigation of their behavior under fusion relevant conditions to assess their overall applicability. To evaluate material performance under five years of simulated fusion reactor service, microstructural characterization of the nanoscale defect distribution has been performed on both constituent phases, revealing peak swelling in the W phase of approximately 0.03%. The γ-phase (Ni-Fe-W) is found to swell approximately 0.68% under the same irradiation conditions, indicating signi

SUBMITTER: Haag JV 

PROVIDER: S-EPMC11868479 | biostudies-literature | 2025 Feb

REPOSITORIES: biostudies-literature