A New Fe20Co20Ni20Cr10Cu30 High-Entropy Alloy: Microstructure, Sliding Wear Resistance, Nano-indentation Creep Response, and Electrochemical Corrosion Behavior

A new Fe20Co20Ni20Cr10Cu30 high-entropy alloy as potential candidate material for welding filler systems was successfully manufactured by vacuum arc melting (120-A amperage, 220-V voltage). Its microstructure consisted of two fcc phases, one rich in Fe, Co, and Cr and the other in Cu and Ni. Parametric models predicted the segregation of phases where the machine learning approach predicted the preservation of the fcc structure experienced during solidification cooling rates. The compression test showed values of 65–70% ductility and 140-GPa modulus of elasticity, whereas the micro-hardness of the alloy was measured to be 175 HV1. The indentation examination of the alloy showed that the loading speed, preset depth, preset load, and creep stage holding time, play an important role on the obtained values. The sliding wear response of the alloy is of typical ductile metals wear mode with the major material removal mechanism being that of an oxidative–delamination character. The corrosion behavior of the alloy is mainly localized and is similar to that of Cantor-based high-entropy alloys.