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Entropy-Driven Melting Point Depression in fcc HEAs

17 Pages Posted: 22 Jul 2021 Publication Status: Published

See all articles by Raymundo Arroyave

Raymundo Arroyave

Texas A&M University - Department of Materials Science and Engineering

Tanner Kirk

Texas A&M University - Department of Materials Science and Engineering

Khaled Youssef

Qatar University

Abstract

High 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, 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 CoCrFeMnNiVAl HEA space using a state of the art CALPHAD database. By using modern

Suggested Citation

Arroyave, Raymundo and Kirk, Tanner and Youssef, Khaled, Entropy-Driven Melting Point Depression in fcc HEAs (2021). Available at SSRN: https://ssrn.com/abstract=3891426 or http://dx.doi.org/10.2139/ssrn.3891426

Raymundo Arroyave (Contact Author)

Texas A&M University - Department of Materials Science and Engineering

Langford Building A
798 Ross St.
College Station, TX 77843-3137
United States

Tanner Kirk

Texas A&M University - Department of Materials Science and Engineering ( email )

Langford Building A
798 Ross St.
College Station, TX 77843-3137
United States

Khaled Youssef

Qatar University ( email )

Materials Science and Technology Graduate Program
Qatar University
Doha, Doha 2713
Qatar

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