The 2 available mechanisms for antiphase-boundary tube formation under single-slip conditions were compared. Some of the assumptions involved, such as the driving force for limited fast climb at jogs and the conditions for the transformation of Kear-Wilsdorf locks into dipoles, were re-examined. Various implications of the 2 mechanisms were analyzed and were also compared with experimental observations of L12 alloys. It was shown that the trailing of antiphase-boundary tubes by climb-relaxed jogs offered an explanation for current microstructural features that were often less constraining than the by-passing of Kear-Wilsdorf locks and subsequent dipolar cross-slip annihilation. Evidence was also provided in support of the generation of antiphase-boundary tubes by direct cross-slip annihilation; thus confirming a manoeuvre originally proposed for B2 alloys.

Kear-Wilsdorf Locks and the Generation of Antiphase-Boundary Tubes in L12 Alloys. Y.L.Chiu, P.Veyssière: Philosophical Magazine, 2003, 83[2], 179-202