Effect of plastic anisotropy on the deformation behavior of bicrystalline aluminum films – Experiments and modeling

摘要: Abstract We investigated the effect of texture-induced plastic anisotropy on deformation behavior ultrafine-grained aluminum films with a bicrystalline texture (two grain variants). The were uniaxially loaded along two different directions such that heterogeneity in variants due to was minimized one direction and maximized other. show smaller strain rate sensitivity hysteresis stress-strain response when they are deformed minimizes compared maximizes it. Notable differences flow stress residual hardening also found for loading directions. To quantitatively understand anisotropy, we simulated using three-dimensional finite elements microstructurally explicit model built from TEM automated crystal orientation mapping samples includes boundary region, plasticity anisotropic elasticity. simulations reveal markedly distribution stresses strains is performed directions, which can be directly related ratio Schmid factors their most active slip systems.