The effect of carbon addition on the mechanical properties and fracture behaviors of cobalt‐chromium‐iron‐ manganese‐nickel high entropy alloy

Abstract The uniaxial tensile and cupping tests of cobalt‐chromium‐iron‐manganese‐nickel high entropy alloy were performed to investigate the effect of solid soluted carbon addition on the strengthening mechanism. The results revealed that at 0.5 at % carbon, the tensile strength, uniform elongation, and cupping strength of the sample were promoted. However, the brittleness fracture appeared by further increasing carbon to 1.0 at %, as caused by the carbides along grain boundary.