Improvement of Microstructure and Mechanical Properties of CoCrCuFeNi High-Entropy Alloys By V Addition

  • Gang Qin
  • Shu Wang
  • Ruirun Chen
  • Huiting Zheng
  • Liang Wang
  • Yanqing Su
  • Jingjie Guo
  • Hengzhi Fu


V element had positive effect in improving the strength of many alloys, so it was possible that V had potential to strengthen CoCrCuFeNi high-entropy alloys (HEAs) with face-centered cubic (FCC) crystal structure, which was relatively weak in strength and had outstanding ductility. In this paper, we studied the alloying effect of V on the phase evolution, microstructure and the mechanical properties of the (CoCrCuFeNi)100−xVx (x = 0-16, atomic ratio, hereafter in at.%) HEAs systematically. The results showed that V element had capacity to induce sigma phase precipitation. The volume fraction of sigma phase increased from 0 to 12%; the compressive yield stress of (CoCrCuFeNi)100−xVx HEAs increased from 300 to 613 MPa with V content increasing from 0 to 16% (atomic ratio, hereafter in at.%). However, the compression fracture strain decreased from 50 to 28%. V addition was beneficial in improving the strength of CoCrCuFeNi HEA, and the increase in sigma phase volume fraction was the key factor for the improvement of the (CoCrCuFeNi)100−xVx HEAs in yield stress.


high-entropy alloys mechanical properties phase precipitation V element 



This work was supported by the Fund of State Key Laboratory of Advanced Welding and Joining and National Key Research and Development Program of China (2017YFA0403804).


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Copyright information

© ASM International 2019

Authors and Affiliations

  • Gang Qin
    • 1
  • Shu Wang
    • 1
  • Ruirun Chen
    • 1
    • 2
  • Huiting Zheng
    • 1
  • Liang Wang
    • 1
  • Yanqing Su
    • 1
  • Jingjie Guo
    • 1
  • Hengzhi Fu
    • 1
  1. 1.National Key Laboratory for Precision Hot Processing of MetalsHarbin Institute of TechnologyHarbinChina
  2. 2.State Key Laboratory of Advanced Welding and JoiningHarbin Institute of TechnologyHarbinChina

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