It was noted that super-dislocations could dissociate via the cross-slip of a 1/2<¯101> super-partial onto an adjacent (111) plane. Because the movement of such non-coplanar super-dislocation core configurations would generate 2 adjacent antiphase boundaries in the -phase matrix, these core configurations contained a sessile partial or super-partial dislocation which delocalized onto 2 adjacent (111) planes which could not move unless diffusion occurred in the core in order to prevent the formation of trailing antiphase boundaries. The trailing of a sessile delocalized 1/6<¯1¯12> partial dislocation from a 1/2<¯1¯12> super-dislocation could give rise to an extrinsically faulted ±1/6<¯1¯12> dipole. Similarly, the trailing of a delocalized 1/3<¯211> super-partial dislocation from a non-coplanar <¯101> super-dislocation could give rise to an extrinsically faulted ±1/3<¯211> dipole. Such ±1/3<¯211> dipoles could also result from the pinning of 1/2<¯110> perfect dislocations by the sessile 1/6<¯1¯12> delocalized partial that was associated with a non-coplanar 1/2<¯1¯12> super-dislocation core.

B.J.Inkson: Scripta Metallurgica et Materialia, 1995, 33[12], 1929-32