Powder Metallurgy Processing of a WxTaTiVCr High-Entropy Alloy and Its Derivative Alloys for Fusion Material Applications

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The WxTaTiVCr high-entropy alloy with 32at.% of tungsten (W) and its derivative alloys with 42 to 90at.% of W with in-situ TiC were prepared via the mixing of elemental W, Ta, Ti, V and Cr powders followed by spark plasma sintering for the development of reduced-activation alloys for fusion plasma-facing materials. Characterization of the sintered samples revealed a BCC lattice and a multiphase structure. The selected-area diffraction patterns confirmed the formation of TiC in the highentropy alloy and its derivative alloys. It revealed the development of C15 (cubic) Laves phases as well in alloys with 71 to 90at.% W. A mechanical examination of the samples revealed a more than twofold improvement in the hardness and strength due to solid-solution strengthening and dispersion strengthening. This study explored the potential of powder metallurgy processing for the fabrication of a high-entropy alloy and other derived compositions with enhanced hardness and strength.
Publisher
NATURE PUBLISHING GROUP
Issue Date
2017-05
Language
English
Article Type
Article
Keywords

PLASMA-FACING COMPONENTS; ATOM-PROBE TOMOGRAPHY; W-BASED ALLOYS; SPARK-PLASMA; MECHANICAL-PROPERTIES; TUNGSTEN COMPOSITES; TENSILE PROPERTIES; CRYOGENIC TEMPERATURES; OXIDATION BEHAVIOR; FATIGUE BEHAVIOR

Citation

SCIENTIFIC REPORTS, v.7

ISSN
2045-2322
DOI
10.1038/s41598-017-02168-3
URI
http://hdl.handle.net/10203/224091
Appears in Collection
NE-Journal Papers(저널논문)
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