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The Different Roles of Entropy and Solubility in High Entropy Alloy Stability

TitleThe Different Roles of Entropy and Solubility in High Entropy Alloy Stability
Publication TypeJournal Article
Year of Publication2016
AuthorsRuiz-Yi, B, Bunn, JK, Stasak, D, Mehta, A, Besser, M, Kramer, MJ, Takeuchi, I, Hattrick-Simpers, J
JournalAcs Combinatorial Science
Date Published09
Type of ArticleArticle
ISBN Number2156-8952
Accession NumberWOS:000383213300009
Keywordsalloys, bulk metallic-glass, chemistry, combinatorial, entropy, materials libraries, mechanical-properties, metastable solid solution, Microstructure, multicomponent alloys, mutual miscibility, Pharmacy, phase-formation, principal elements, solid-solution, solubility, stability, x-ray-diffraction

is the result of mutual solubility of the principal elements. Here, we demonstrate the first self-consistent study of the relative importance of these two proposed mechanisms. In situ high-throughput synchrotron diffraction studies were used to monitor the stability of the single phase alloy in thin-film (Al1-x-yCuxMoy)FeNiTiVZr composition spread samples. Our results indicate that a metastable solid solution can be captured via the rapid quenching typical of physical vapor deposition processes, but upon annealing the solid-solution phase stability is primarily governed by mutual miscibility.

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Short TitleACS Comb. Sci.
Alternate JournalACS Comb. Sci.