A high-angle grain boundary, which contained a regular network of dislocations, was studied by means of transmission electron microscopy. It was shown that the reference structure for this grain boundary was unlikely to be a constrained coincidence site lattice, and that a more likely reference structure corresponded to the existence of a near-2d periodicity in a plane which made a small angle with respect to the grain boundary plane. The dislocation arrangement which would be required in order to accommodate the angular deviation from the relative orientation for this reference structure was calculated by using an O-lattice method. This led to a good semi-quantitative agreement with experimentally observed images; thus indicating that the proposed reference structure was the one which was adopted by this grain boundary.

I.MacLaren, M.Aindow: Materials Science Forum, 1996, 207-209, 289-92