ABSTRACT
Dislocation behavior in Cu-Al crystals has been continuously observed with a 3 MV electron microscope. Results show that conjugate slip is closely related to each stage of deformation as follows: a) Conjugate dislocations are widely dispersed on primary slip planes by the primary slip nearby and form a number of hexagonal dislocation networks on these planes. b) By this process, the primary slip bands successively change to the sterile ones against which conjugate dislocations pile up. c) The pile-up conjugate dislocations cause reactivation of the sterile primary slip bands.
