A  = 13, 22.6 [001]½ boundary was studied in material which was plastically deformed at 850C using a range of loading orientations and strains. The resultant deformation was characterized by using transmission electron microscopy, and this included the determination of the operating slip systems and the Burgers vectors of the various grain boundary dislocations which were produced. At low strains, the observed grain boundary dislocations were found to be consistent with the occurrence of a dissociation reaction in the boundary of the incoming crystal dislocations. The latter produced two ¼<111> partial grain boundary dislocations. This provided a good compromise between the overall reduction in elastic strain energy and the increase in step height area in the boundary. As deformation proceeded, the various sets of grain boundary dislocations interacted and further dissociated, so that a new network of grain boundary dislocations was produced. Partial dislocations which had a 1/8 component along the [001]½ misorientation axis were also observed.

L.Sagalowicz, W.A.T.Clark: Philosophical Magazine A, 1995, 72[3], 561-77