Multi-scale modeling of dislocation boundaries: Understanding interaction and effect of rotation angle

The formation and evolution of dislocation boundaries during plastic deformation is one of the primary basis for understanding material strength, shaping, texture, re-crystallization properties, and plastic deformation itself. Better understanding of plastic deformation characteristics will provide for enormous benefits in manipulation of manufacturing processes. Although several analytical and numerical studies have been conducted on 2D analysis of simplified configurations of dislocation boundaries, more complex dislocation boundaries have not received much attention. The present paper presents a 3D numerical analysis of a geometrically necessary dislocation boundary using a multi-scale simulation technique: the multi-scale discrete dislocation plasticity (MDDP). The characteristics and internal structure of the dislocation boundary are extracted from experimental measurements. Effect of dislocation boundary rotation angle on the generated self-stress field and behavior of multiple dislocation boundaries is investigated.