The application of surface dislocation theory to the f.c.c.-b.c.c. interface

The formal theory of surface dislocations has been applied to the f.c.c.-b.c.c. interfaces defined by (111)_F || (110)_B. With the Bain correspondence between the two lattices, various theoretical models and experimental results on these interfaces have been analyzed. The results of the analysis suggest that preferred interface orientations can be explained on the basis that they are those of minimum or near-minimum Burgers-vector contents. This concept leads to an improved criterion for comparing the elastic component of interfacial energies. The limitations of geometrical models for predicting low-energy interfaces are discussed.