The orientation of dislocation walls in grains with a so-called high wall density structure was investigated in rolled samples as a function of strain. It was found that, after 11% reduction, the fraction of high wall density grains remained approximately constant. It was therefore expected that the dislocation walls, which formed at an angle of about 45º to the rolling direction, would rotate so that they approached an orientation that was parallel to the rolling plane. The angle with respect to the rolling direction does not in fact change very much. It was suggested that the walls rotated backwards so as to counteract the geometrically imposed rotation.

The Orientation of Dislocation Walls in Rolled Copper Relative to the Sample Coordinate System H.Christoffersen, T.Leffers: Acta Materialia, 1998, 46[12], 4093-102