To enhance the ambient mechanical properties of a CrFeCoNi high-entropy alloy

the alloying of 3%C（in atomic fraction）was performed.The alloys were subject to homogenization treatment at 1 200 ℃ for 12 h

cold rolling and recrystallization annealing at 800 ℃ for 1 h

obtaining fully recrystallized microstructures.The effects of carbide precipitation on the phase structure

microstructure

tensile behavior and corrosion behavior at room temperature were analyzed.The results reveal that after C alloying

spherical M

23

C

6

carbides are precipitated besides of equiaxed-grained matrix with face-centered cubic structure

which are non-uniformly distributed on the grain boundaries and in the intragranular regions.The yield strength at room temperature is increased from 386 MPa of the CrFeCoNi alloy to 706 MPa of the C-alloyed one

however

the elongation and corrosion resistance are decreased to some extent.