It was recalled that plastic deformation by slip induced rotations of the crystallographic lattice, and evolution of the dislocation structures. Both lattice rotations and dislocation structures exhibited a dependence, upon the grain orientation, which reflected an underlying relationship to the slip pattern. Relationships between the type of dislocation structure formed (in particular, the crystallographic alignment of dislocation boundaries) and the slip pattern were demonstrated. These relationships were applied to polycrystals deformed in tension and rolling; producing good agreement with experiment for rolling but less good agreement for tension. Those grain orientations for which the relationships did not hold in tension were also the grain orientations where the deviation between lattice rotations, observed by three-dimensional X-ray diffraction during tension, deviated the most from those predicted by the Taylor model.

Slip Systems, Lattice Rotations and Dislocation Boundaries. G.Winther: Materials Science and Engineering A, 2008, 483-484, 40-6