 This study investigates the effect of vanadium-V, addition on the mechanical properties and deformation mechanisms of equiautomic COCRNI alloys. It was found that V addition can significantly increase the yield strength of these alloys, as well as their strain hardening rate. This is due to the increased stacking fault energy and lattice distortion caused by V addition. Additionally, the deformation mechanisms of these alloys change depending on the amount of V present. When V content is low, the predominant deformation mechanism is dislocation slip, whereas when V content is high, the predominant deformation mechanisms are dislocation slip and stacking faults. This article was authored by Rui Shen, Zinyu NI, CUN Peng, and others.