It was noted that recent developments in high-resolution transmission electron microscopy now permitted the lattice imaging of defects. It was shown here how this technique could be used in conjunction with weak-beam methods so as obtain precise information concerning the elementary mechanisms of shear of ’ precipitates by matrix dislocations in Ni-based super-alloys. This revealed the types and spatial extensions of superlattice stacking faults that were to be encountered in this family of composite alloys. With the aid of lattice simulation, the physical nature of the bounding dislocations at the /’ interface, and not merely the mathematical value of their Burgers vectors, could be found.

B.Décamps, J.M.Pénisson, M.Condat, L.Guétaz, A.J.Morton: Materials Science Forum, 1995, 189-190, 261-6