A thermodynamic description of the Co-Cr-Fe-Ni-V system for high-entropy alloy design
- Authors
- Choi, Won-Mi; Jo, Yong Hee; Kim, Dong Geun; Sohn, Seok Su; Lee, Sunghak; Lee, Byeong-Joo
- Issue Date
- 9월-2019
- Publisher
- PERGAMON-ELSEVIER SCIENCE LTD
- Keywords
- Thermodynamic modelling; CALPHAD; Co-Cr-Fe-Ni-V; High-entropy alloy
- Citation
- CALPHAD-COMPUTER COUPLING OF PHASE DIAGRAMS AND THERMOCHEMISTRY, v.66
- Indexed
- SCIE
SCOPUS
- Journal Title
- CALPHAD-COMPUTER COUPLING OF PHASE DIAGRAMS AND THERMOCHEMISTRY
- Volume
- 66
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/63026
- DOI
- 10.1016/j.calphad.2019.05.001
- ISSN
- 0364-5916
- 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.
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