BASE ALLOY CONCEPT IN THE DEVELOPMENT OF HIGH-ENTROPY MATERIALS

Abstract

The requirements to be met by the high-entropy alloy to be used as a base one for the development of new high-entropy materials have been formulated. Four alloys that comply with these requirements were selected. The use of CrMnFeCoNi alloy with an fcc lattice as a base one was analyzed, considering that this alloy has been the most extensively studied and has adequate ductility. The influence of 12 elements (Al, Ti, Zr, Hf, V, Nb, Ta, Mo, W, Re, Cu, Y) on the phase composition of the base alloy at the equiatomic content of each additive was studied. The limited solubility of each element in the base alloy was determined. It was found that doping of the base alloy allows the bcc, B2, σ, µ, χ, and Laves phases C14 and C15 to be obtained. The feasibility of using the base alloy to develop new high-entropy materials with the approaches applied to develop conventional alloys is shown.