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An understanding of high entropy alloys from phase diagram calculations |
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| Affiliation: | 1. CompuTherm LLC, Madison, WI, USA;2. National Institute of Standards and Technology, Gaithersburg, MD, USA;1. State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083, China;2. Advanced Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan;3. Thayer School of Engineering, 14 Engineering Dr., Dartmouth College, Hanover, NH 03755, USA;4. Department of Materials Science and Engineering, National TsingHua University, Taiwan;5. Center of Advanced Structural Materials, Department of Mechanical and Biomedical Engineering, College of Science and Engineering, City University of Hong Kong, Kowloon, Hong Kong, China;6. Department of Materials Science and Engineering, The University of Tennessee, Knoxville, TN 37996, USA |
| Abstract: | The concept of High Entropy Alloy (HEA) is understood from the point of view of phase diagram calculation. The role of entropy of mixing on the phase stability is discussed for both ideal and non-ideal solid solution phases. The relative stability of a solid solution phase and line compounds is illustrated using hypothetical systems. Calculated binary and multicomponent phase diagrams are used to explain the phenomena observed experimentally for HEAs. The potential of using the CALPHAD (CALculation of PHAse Diagrams) approach in aiding the design of alloys with multiple key components is also discussed. |
| Keywords: | High entropy alloy CALPHAD Multicomponent Phase diagram calculation Phase stability |
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