Examining the pathways for deformation band formation at the mesoscale

Abstract

At the macroscopic scale, strain accumulation is known to form parallel to the plane of maximum shear stress. In this work, plastic strain accumulation is tracked across four mesoscale areas of interests. Each representing a different configuration of tension-torsion loading. The local deviations in the deformation pathways were investigated relative to the plane of maximum shear stress. The deviations in the deformation pathways were observed to be a function of the local plastic strain magnitude and the microstructural features. From these results, a representative volume element was created based on the macroscopic and micromechanical deformations as well as the spatial statistics of the deformation bands.