The dissociation of a [¯101] super-dislocation was studied by means of computer simulation techniques, using the embedded atom method. Three types of dissociation were identified; depending upon the initial position of the elastic centers of the super-dislocation. One was a stable planar dissociation in which the super-dislocation dissociated, on only one {111} plane, into a pair of ½[¯101] super-partials that were separated by antiphase boundary. Another stable dissociation occurred on 2 adjacent {111} planes that were joined by an intersecting {111} or (010) plane. The metastable dissociation was one in which the dissociation occurred in a T-shape: the super-dislocation dissociated, on 2 intersecting {111} planes, into 3 partials. One of these was a ½[¯101] partial and the others were 2 widely separated 1/6{112} Shockley partials with a complex stacking fault between them.

Computer Simulation of Superdislocation Dissociation in Ni3Al M.Wen, S.Li: Acta Materialia, 1998, 46[12], 4351-5