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Ta-Nb-Mo-W refractory high-entropy alloys: Anomalous ordering behavior and its intriguing electronic origin

TitleTa-Nb-Mo-W refractory high-entropy alloys: Anomalous ordering behavior and its intriguing electronic origin
Publication TypeJournal Article
Year of Publication2018
AuthorsSingh, P, Smirnov, AV, Johnson, DD
JournalPhysical Review Materials
Volume2
Pagination055004
Date Published05
Type of ArticleArticle
ISBN Number2475-9953
Accession NumberWOS:000433921000001
Keywordsantiferromagnetic chromium, density, design, ductility, Materials Science, metallic alloys, phase-stability, strength, system
Abstract

space is traversed-applying it on prototype refractory A2 Ta-Nb-Mo-Whigh-entropy alloys. Near ideal stoichiometry, this alloy has anomalous, intricate chemical ordering tendencies, with long-ranged chemical interactions that produce competing short-range order (SRO) with a crossover to spinodal segregation. This atypical SRO arises from canonical band behavior that, with alloying, creates features near the Fermi surface (well defined even with disorder) that change to simple commensurate SROwith (un) filling of these states. Our results reveal howcomplexity and competing electronic effects control ordering in these alloys.

DOI10.1103/PhysRevMaterials.2.055004
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