The interaction of dislocations in anisotropic face-centred cubic crystals

Abstract

An elastic analysis of dislocations in anisotropic media has been applied to study the interaction of dislocations on intersecting {111} planes in the face-centred cubic structure. Both long-range and short-range interactions have been considered in a series of f.c.c. elements; the stability of each configuration resulting from a short-range attraction has been determined. The widths of the possible barriers in the various f.c.c. elements have been computed, and the relative strength and importance of each barrier discussed. The most important barriers are those associated with the long-range interaction of two dislocations whose Burgers vectors are orthogonal. The Lomer-Cottrell barrier, although relatively weak, does exist in the extended form.