The impact of particle distributions and grain-level inhomogeneities on post-necking deformation and fracture in AA5754 sheet alloys during uniaxial tension

The influence of both particle distributions and grain structure on post-necking deformation, e.g., from localized necking to fracture, is studied using a novel edge-constrained plane strain model. An isotropic elasto-plastic material model is developed for the matrix material with grains having different strengths in terms of their Taylor factors. The Taylor factors and the grain orientations are then mapped into an FE model with a modified …