An investigation was made of the internal structure of microbands in a shear-deformed copper single crystal. The microstructure was characterized using high-resolution electron back-scattering diffraction. The occurrence of microbands was due to the alternation of local orientation, which was characteristic of a deformation laminate. These microbands contain a substructure consisting of further local 1°-orientation alternations. A two-dimensional discrete dislocation dynamics model was used to describe the orientation substructure within the microbands. The boundary conditions for the simulation were estimated from the distribution of the geometrically necessary dislocation density obtained from the orientation map. The dislocation arrangement in the dynamic simulation explains the formation of the experimentally observed substructure.

Investigation of the Internal Substructure of Microbands in a Deformed Copper Single Crystal: Experiments and Dislocation Dynamics Simulation. O.Dmitrieva, J.V.Svirina, E.Demir, D.Raabe: Modelling and Simulation in Materials Science and Engineering, 2010, 18[8], 085011