The dislocations in {10•2} twin boundaries were investigated by means of high-resolution electron microscopy. The topological parameters (Burgers vectors, step heights) of various defects were identified and were found to be in very good agreement with theoretical predictions. The core structures of all of the defects which were studied were found to be relatively compact, and step risers tended to form parallel to low-index planes of the adjacent crystals. Various mechanisms were suggested for the generation of these defects; including primary deformation twinning, decomposition of crystal dislocations which impinged on the twins, and interactions of interfacial defects.

T.Braisaz, P.Ruterana, G.Nouet, R.C.Pond: Philosophical Magazine A, 1997, 75[4], 1075-95