A thermodynamic description of the Co-Cr-Fe-Ni-V system for high-entropy alloy design
SCIE
SCOPUS
- Title
- A thermodynamic description of the Co-Cr-Fe-Ni-V system for high-entropy alloy design
- Authors
- CHOI, WON MI; JO, YONGHEE; Kim, D.G.; Sohn, S.S.; LEE, SUNG HAK; LEE, BYEONG JOO
- Date Issued
- 2019-09
- Publisher
- PERGAMON-ELSEVIER SCIENCE LTD
- Abstract
- To increase the strength of representative equiatomic CoCrFeMnNi HEAs (high entropy alloys), many researchers have attempted to generate a secondary phase or to maximize solid-solution hardening effects. The addition of vanadium (V) could be an effective way to achieve both effects because V is a strong sigma (sigma) and body-centered cubic (bcc) phase stabilizer and has a relatively large atomic size. The amount of secondary phase material formed is directly related to mechanical properties. Therefore, the ability to predict phase equilibria could guide decisions about V-added HEA design. Although the CALculation of PHAse Diagram (CALPHAD) approach can be an effective tool for predicting the phase equilibria, a thermodynamic database is still required. Therefore, the present paper aims to provide a thermodynamic description of the Co-Cr-Fe-Ni-V HEA system by developing thermodynamic descriptions of the Co-Cr-Fe, Co-Cr-V, Co-Fe-V, and Co-Ni-V systems. The reliability of the thermodynamic description developed for the Co-Cr-Fe-Ni-V quinary system is experimentally confirmed using newly designed Co-Cr-Fe-Ni-V HEM.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/99435
- DOI
- 10.1016/j.calphad.2019.05.001
- ISSN
- 0364-5916
- Article Type
- Article
- Citation
- CALPHAD-COMPUTER COUPLING OF PHASE DIAGRAMS AND THERMOCHEMISTRY, vol. 66, 2019-09
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