Slip systems extracted from lattice rotations and dislocation structures

Data on lattice rotations and dislocation structures induced in aluminium by tensile deformation are analysed together in order to extract the active slip systems. The analysis falls in two steps: (i) from the combination of lattice rotation and dislocation structure data, the grain orientation space represented by the stereographic triangle is subdivided into regions with the same active slip systems; and (ii) the active slip systems calculated from the lattice rotations are compared with those known to be active based on the dislocation structure. For the entire stereographic triangle active slip systems which are in good agreement with both lattice rotations and dislocation structures are identified, showing that the grain orientation is the primary factor controlling the slip systems.