Journal
SCRIPTA MATERIALIA
Volume 179, Issue -, Pages 40-44Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2019.12.041
Keywords
Gibbs free energy; High entropy alloys; Perturbation; Phase stability
Categories
Funding
- National Natural Science Foundation of China [51771096, 51871129]
- Tsinghua National Laboratory for Information Science and Technology
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A perturbation model is used to evaluate the phase stabilities of high entropy alloys. The calculation results can successfully predict the phase stabilities of many high entropy alloys and shows that stable single phase high entropy alloys are rare. The effect of increased entropy cannot balance the fast-increased driving force for the formation of intermetallics. As the temperature increases, the stabilities of solid solutions will increase and the portion of single-phase alloys will expand. The model we propose provides a new paradigm to understand the phase stabilities of high entropy alloys. (C) 2020 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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