Neutron irradiation effects on the mechanical properties of powder metallurgical processed tungsten alloys

Takeshi Miyazawa, Lauren M. Garrison, Josina W. Geringer, Makoto Fukuda, Yutai Katoh, Tatsuya Hinoki, Akira Hasegawa

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33 Scopus citations

Abstract

Neutron irradiation effects on the tensile properties of Pure W, K-doped W, W–3%Re, and K-doped W–3%Re were examined under the US-Japan collaboration project PHENIX. The fission neutron irradiation experiments were carried out up to 0.74 dpa at 600 °C and 800 °C. Pure W (SR) showed irradiation hardening and loss of ductility after irradiation at 600 °C and 800 °C. K-doped W–3%Re (SR) also exhibited irradiation hardening but was ductile after irradiation. Characteristic points of the K-doped W–3%Re (SR) are small grain size and layered structure. The stress-relief treatment and the layered structure may improve the ductility of powder-metallurgy W alloys after neutron irradiation, so a combination of K-doping and Re addition would be beneficial to improve irradiation resistance.

Original languageEnglish
Article number151910
JournalJournal of Nuclear Materials
Volume529
DOIs
StatePublished - Feb 2020

Funding

The authors thank M. McAlister for technical support in the tensile tests. This work was performed as part of the U.S.–Japan PHENIX Collaboration Project on Technological Assessment of Plasma Facing Components for DEMO Reactors. ORNL research was sponsored by the U.S. Department of Energy, Office of Fusion Energy Sciences , under contract DE-AC05-00OR22725 with UT-Battelle, LLC. This study was supported by JSPS KAKENHI , Grant Number 17H01364 . Appendix A The authors thank M. McAlister for technical support in the tensile tests. This work was performed as part of the U.S.?Japan PHENIX Collaboration Project on Technological Assessment of Plasma Facing Components for DEMO Reactors. ORNL research was sponsored by the U.S. Department of Energy, Office of Fusion Energy Sciences, under contract DE-AC05-00OR22725 with UT-Battelle, LLC. This study was supported by JSPS KAKENHI, Grant Number 17H01364.

FundersFunder number
Office of Fusion Energy SciencesDE-AC05-00OR22725 with UT-Battelle
U.S. Department of Energy
Fusion Energy SciencesDE-AC05-00OR22725
Oak Ridge National Laboratory
Japan Society for the Promotion of Science17H01364

    Keywords

    • Neutron irradiation
    • Polycrystalline
    • Tensile properties
    • Thermal neutron shield
    • Tungsten

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