Topologically Close-packed Phase Formation in High Entropy Alloys: A Review of Calphad and Experimental Results

被引:0
作者
K. Guruvidyathri
K. C. Hari Kumar
J. W. Yeh
B. S. Murty
机构
[1] Indian Institute of Technology Madras,Department of Metallurgical and Materials Engineering
[2] National Tsing Hua University,Department of Materials Science and Engineering
来源
JOM | 2017年 / 69卷
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摘要
One of the major challenges in high entropy alloy (HEA) research is to obtain single-phase solid solutions by proper selection of components and processing techniques. Often one encounters situations where topologically close-packed (TCP) phases are present in the HEA microstructures. TCP phases are a class of intermetallic phases that are in general considered undesirable. The ability to predict these phases in HEAs using the Calphad (CALculation of PHAse Diagrams) method has been shown to accelerate the identification of promising compositions. In this review, an analysis of the reported Calphad studies and corresponding microstructural information on HEAs is done to evaluate the success of the Calphad method for TCP phases. A total of 52 alloys with 123 post-heat treatment microstructures reported so far have been compared. Challenges and issues in experiments and calculations are brought out with a possible way forward.
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页码:2113 / 2124
页数:11
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