Two mechanisms of the formation of antiphase-boundary tubes resulting from the shortening of Kear-Wilsdorf locks were examined in the light of a recent paper by Chiu and Veyssière. The mechanism, based upon the by-passing of Kear-Wilsdorf locks and subsequent annihilation of the screw dipole by cross-slip, was considered in more detail. It was concluded that the objections raised by Chiu and Veyssière against this mechanism were not valid, and that the predictions of the mechanism were consistent with their experimental observations. Questions were raised as to whether some of their observations were inconsistent with the operation of the mechanism based upon the motion of jogs whose corners were relaxed by forced climb.

Kear-Wilsdorf Locks and the Formation of Antiphase-Boundary Tubes in L12 Alloys. P.B.Hirsch: Philosophical Magazine, 2003, 83[8], 1007-32