5754 Aluminum Sheet Deformed Along Bi-Linear Strain Paths

Abstract

Sheet specimens of aluminum alloy 5754 were deformed along a series of bi‐linear, equal‐biaxial and uniaxial, strain paths while simultaneously measuring stress‐strain behavior. Using the measured crystallographic texture before and after deformation, the VPSC model that incorporates texture evolution was used to simulate the flow stress and hardening behavior. Including latent hardening of multiple slip planes allowed the model to explain the decrease in flow stress when changing from equal‐biaxial to uniaxial deformation. However, the model did not capture the details of the drop in flow stress nor the magnitude of the plastic hardening after the change in deformation mode. This is likely due to room temperature recovery between the two steps of testing.