The dissociation of a [101] super-dislocation in Ni3Al was studied by computer simulation techniques using the embedded atom method. Three types of dissociation were obtained, depending upon the initial position of elastic centers of the super-dislocation. One was the stable planar dissociation that the super-dislocation dissociated on only one {111} plane into a pair of ½[101] super-partials separated by antiphase boundary. Another stable dissociation occurred on two adjacent {111} planes joined by an intersecting {111} or (010) plane. The metastable one was that dissociation occurred in a T-shape: the super-dislocation dissociated on two intersecting {111} planes into three partials: one ½[101] partial and two widely separated 1/6(112) Shockley partials with a complex stacking fault between.

Superdislocation Dissociation in Intermetallic Compound Ni3Al. Wen, M., Lin, D.: Transactions of Nonferrous Metals Society of China, 1999, 9[1], 98-9. See also: Acta Materialia, 1998, 46[12], 4351-5