Metals and Materials International

, Volume 23, Issue 5, pp 839–847 | Cite as

Design of new face-centered cubic high entropy alloys by thermodynamic calculation

  • Won-Mi Choi
  • Seungmun Jung
  • Yong Hee Jo
  • Sunghak Lee
  • Byeong-Joo Lee


A new face-centered cubic (fcc) high entropy alloy system with non-equiatomic compositions has been designed by utilizing a CALculation of PHAse Diagram (CALPHAD) - type thermodynamic calculation technique. The new alloy system is based on the representative fcc high entropy alloy, the Cantor alloy which is an equiatomic Co- Cr-Fe-Mn-Ni five-component alloy, but fully or partly replace the cobalt by vanadium and is of non-equiatomic compositions. Alloy compositions expected to have an fcc single-phase structure between 700 °C and melting temperatures are proposed. All the proposed alloys are experimentally confirmed to have the fcc single-phase during materials processes (> 800 °C), through an X-ray diffraction analysis. It is shown that there are more chances to find fcc single-phase high entropy alloys if paying attention to non-equiatomic composition regions and that the CALPHAD thermodynamic calculation can be an efficient tool for it. An alloy design technique based on thermodynamic calculation is demonstrated and the applicability and limitation of the approach as a design tool for high entropy alloys is discussed.


phase diagram high entropy alloys (HEAs) CALPHAD X-ray diffraction electron backscattering diffraction (EBSD) 


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Copyright information

© The Korean Institute of Metals and Materials and Springer Science+Business Media B.V. 2017

Authors and Affiliations

  • Won-Mi Choi
    • 1
  • Seungmun Jung
    • 1
  • Yong Hee Jo
    • 1
  • Sunghak Lee
    • 1
  • Byeong-Joo Lee
    • 1
  1. 1.Department of Material Science and EngineeringPohang University of Science and Technology (POSTECH)PohangRepublic of Korea

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