Mechanical behaviors and texture evolution of CoCrFeNi high-entropy alloy under shear-tension deformation

Abstract

The shear-tension deformation behaviors of CoCrFeNi high-entropy alloy (HEA) were investigated by introducing five groups of different inclined notches, and mainly focus on mechanical response and texture evolution. The results show that CoCrFeNi HEA exhibits significant structural sensitivity and high notch strength ratio (NSR), and the stress concentration factor Kt of specimens and stress distribution at the notch roots were acquired by finite element method (FEM). In addition, the notch strengthening effect of HEA is more obvious with the increase of shear stress component. When the shear stress component increases, the E {111}<110>, F {111}<112> and γ-fiber textures are the main texture components after deformation. The evolution characteristics of Cu-type and Brass-type textures under the shear-tension stress states are significantly different from those under the rolled state. Moreover, complex stress states have no obvious effect on Cu texture under shear-tension deformation, but a large one on CuT texture.