Based on the solid solution phase formation design parameters of high entropy alloy

Co-Cr-Fe-Ni alloy system was optimized by adding light and refractory elements

and a new type of light-weight

high strength-ductile HEAs with dual phase（BCC+FCC） structure and desirable high temperature strength was obtained.The results indicate that the optimal CoCrFeNiAl

2

CuV

0.8

alloy possesses the expected dual-phase structure

and maintains excellent compression performance at room temperature and even high temperature

while the plastic deformation ability needs to be further improved. The experimental results are basically consistent with the expectations from the parameter design

verifying the feasibility of composition design for HEAs based on parameter calculation.