Equilibrium high entropy alloy phase stability from experiments and thermodynamic modeling

Saal, James E.; Berglund, Ida S.; Sebastian, Jason T.; Liaw, Peter K.; Olson, Greg B.

doi:10.1016/j.scriptamat.2017.10.027

Title: Equilibrium high entropy alloy phase stability from experiments and thermodynamic modeling

Journal Article · Sun Oct 29 00:00:00 EDT 2017 · Scripta Materialia

DOI:https://doi.org/10.1016/j.scriptamat.2017.10.027· OSTI ID:1405304

^[1]; Berglund, Ida S. ^[1]; Sebastian, Jason T. ^[1]; Liaw, Peter K. ^[2]; Olson, Greg B. ^[3]

QuesTek Innovations LLC, Evanston, IL (United States)
The Univ. of Tennessee, Knoxville, TN (United States)
QuesTek Innovations LLC, Evanston, IL (United States); Northwestern Univ., Evanston, IL (United States)

Long-term stability of high entropy alloys (HEAs) is a critical consideration for the design and practical application of HEAs. It has long been assumed that many HEAs are a kinetically-stabilized metastable structure, and recent experiments have confirmed this hypothesis by observing HEA ecomposition after long-termequilibration. In the presentwork,we demonstrate the use of the CALculation of PHAse Diagrams (CALPHAD) approach to predict HEA stability and processing parameters, comparing experimental long-term annealing observations to CALPHAD phase diagrams from a commercially-available HEA database. As a result, we find good agreement between single- and multi-phase predictions and experiments.

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Research Organization:: QuesTek Innovations LLC, Evanston, IL (United States)

Sponsoring Organization:: USDOE Office of Science (SC)

Grant/Contract Number:: SC0013220

OSTI ID:: 1405304

Alternate ID(s):: OSTI ID: 1549411

Journal Information:: Scripta Materialia, Vol. 146, Issue C; ISSN 1359-6462

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 53 works

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