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AuthorTanner, Kirk
AuthorVela, Brent
AuthorMehalic, Seth
AuthorYoussef, Khaled
AuthorArróyave, Raymundo
Available date2022-05-11T04:46:25Z
Publication Date2022-02-01
Publication NameScripta Materialia
Identifierhttp://dx.doi.org/10.1016/j.scriptamat.2021.114336
CitationKirk, T., Vela, B., Mehalic, S., Youssef, K., & Arróyave, R. (2022). Entropy-driven melting point depression in fcc HEAs. Scripta Materialia, 208, 114336.
ISSN13596462
URIhttps://www.sciencedirect.com/science/article/pii/S1359646221006163
URIhttp://hdl.handle.net/10576/30808
AbstractHigh Entropy Alloys (HEAs) are an increasingly dominant alloy design paradigm. The premise of entropic stabilization of single-phase alloys has motivated much of the research on HEAs. Chemical complexity may indeed help stabilize single alloy phases relative to other lower-entropy competing solid phases. Paradoxically, this complexity may de-stabilize these alloys against the liquid phase, potentially limiting the application space of HEAs at elevated temperatures. In this work, we carry out a comprehensive investigation of the phase stability in the fcc CoCrFeMnNiV-Al HEA space using a state of the art CALPHAD database. By using modern visualization techniques and statistical analysis we examine the trade-off between chemical complexity and stability against the liquid state and identify a potentially difficult to overcome barrier for development of high temperature alloys, at least within the conventional fcc HEA space. Limited experimental data seem to be consistent with this analysis.
Languageen
PublisherElsevier
SubjectHigh entropy alloys
Alloy design
High temperature applications
Melting
TitleEntropy-driven melting point depression in fcc HEAs
TypeArticle
Volume Number208
dc.accessType Open Access


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