18-08-2021 | STRUCTURE, PHASE TRANSFORMATIONS, AND DIFFUSION
A Novel Refractory High Entropy Alloy CrHfNbZrTa0.5: Phase Analysis, Microstructure, and Compressive Properties
Published in: Physics of Metals and Metallography | Issue 14/2021
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A new refractory alloy, CrHfNbZrTa0.5, was prepared by a vacuum arc-melting, and its phase analysis, microstructures, and compressive properties in as-cast and annealed conditions were investigated. The phase components of the as-cast CrHfNbZrTa0.5 alloy were mainly composed of BCC + Laves phases, while an extra HCP phase emerged after annealing. The yield strength of the as-cast and annealed alloys were 1457 and 1517 MPa respectively, both which are significantly larger than 929 MPa of the most concerned HfNbTaTiZr. The relatively stable high-strength of the as-cast and annealed alloys might originate from the high ductility-brittle temperature and the intrinsic strength of the Cr-containing Laves phase.
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