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Blistering and retention behavior of laser powder bed fused tungsten alloys under hydrogen plasma irradiation

Author
Abstract

In this study, pure tungsten (W) fabricated by powder metallurgy and laser powder bed fusion (LPBF) formed W-Ta and W-ZrC alloys were exposed to hydrogen plasma. Severe blistering was found in LPBFed W-Ta specimens due to a strong [111] crystallographic texture and the large number of particle-matrix interfaces in the LPBFed W-ZrC inhibits the blister growth. The retention of LPBFed W alloys is lower than that of pure W due to the presence of large columnar grains and cracks. The results highlight the capability of tailoring the microstructures of W alloys by the LPBF technique to achieve improved plasma-compatible performance.

Year of Publication
2024
Journal
Journal of Nuclear Materials
Volume
595
Number of Pages
155049
Date Published
07/2024
Type of Article
Short communication
DOI
10.1016/j.jnucmat.2024.155049
PId
56b482bbf222251a9dd5cb94e81002bf
Alternate Journal
J. Nucl. Mater.
Journal Article
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