Gradient of microhardness in the contact zone coating (HEA CoCrFeNiMn) – substrate (alloy 5083)

In this work, a coating of a high-entropy alloy CoCrFeNiMn of non-atomic composition is formed on a substrate made of alloy 5083 by the method of wire-arc additive manufacturing (WAAM). The authors investigated the change in microhardness in the contact zone of the coating – substrate system. Using the methods of modern physical materials science, the structural and phase state, defect structure and elemental composition of the coating – substrate system were analyzed. The discovered physical mechanisms contribute to an increase in hardness in the contact zone.