Characteristics of the strength of high entropy metal alloys

Abstract

Using the pseudopotential method for the equiatomic Al—Co—Ni—Fe—Cr alloy, the structure type, binding energy and lattice parameters in the equilibrium state are determined. The average displacement of atoms from the positions of an ideal averaged lattice, the theoretical strength, the moduli of elasticity, shear and compressibility of a metallic HEAs under uniaxial [111] deformations are calculated. A technique is proposed for calculating the strength of an alloy taking into account the direct influence of surrounding atoms on the displacement of the chosen atom, as well as the change in the displacements during deformation of the alloy, which makes it possible to more adequately take into account the structure of the alloy in calculations from the first principles.