Texture effects and rate-dependent behaviors of notched magnesium bars

It is known that the mechanical behavior of many hexagonal close-packed (HCP) materials sensitive to textural variations. In technologically important magnesium (Mg) alloys, anisotropic plastic behaviors and their dependence on different processing-induced textures have been reasonably well studied under relatively simple stress states. However, a detailed assessment rate-dependent microstructure–property linkages triaxial states less explored. this work, we present computational investigation role played by strain rate, texture, state in macro–micro characteristics Mg alloys. Three-dimensional boundary value problems using smooth notched round bar geometries subjected tensile deformation are modeled crystal plasticity framework includes slip twinning mechanisms. We examine responses over six orders magnitudes rates, for three initial span broad spectrum strengths, specimen induce varying levels triaxiality. The simulations reveal remarkable transition response from conventional power-law type sigmoidal certain combinations textures, triaxiality levels, rates. While strongly rate-dependent, macroscopic anisotropy has negligible effect rate compared texture. discuss potential implications these observations failure