| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 7963169 | Journal of Nuclear Materials | 2018 | 9 Pages |
Abstract
To clarify the irradiation hardening behavior of neutron-irradiated tungsten(W), the formation behavior of rhenium(Re)-enriched cluster and W-Re precipitation with displacement damage in fission reactors environment was investigated by the atom probe tomography (APT) technique, and the results obtained by APT and microstructural observation by transmission electron microscopy (TEM) were compared. Neutron-irradiated pure W and W-10Re alloys were used for the analysis. These samples were irradiated to 0.96 dpa at 538â¯Â°C in a fast experimental reactor Joyo, and irradiated to 0.90 dpa at 500â¯Â°C in a mixed spectrum reactor HFIR. The chemical compositions of the matrix, Re clusters, and precipitates were determined by the AP analysis. The Joyo-irradiated samples contained lower levels of transmuted Re and Os, while the HFIR-irradiated samples contained higher levels of Re and Os. The Re-enriched clusters demonstrated characteristic spatial distribution related to defect cluster distribution in each irradiated specimen.
Keywords
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Physical Sciences and Engineering
Energy
Nuclear Energy and Engineering
Authors
Taehyun Hwang, Akira Hasegawa, Keiko Tomura, Naoki Ebisawa, Takeshi Toyama, Yasuyoshi Nagai, Makoto Fukuda, Takeshi Miyazawa, Teruya Tanaka, Shuhei Nogami,