The core structure of 1/2[¯101] super-partials was studied by using the embedded atom method, and computer simulation techniques. It was found that the initial position of the dislocation elastic center, relative to the atomistic lattice site, had a marked effect upon the core structure. Two typical cores were identified for 1/2[¯101] super-partials that were separated by antiphase boundary on (111) planes. The most stable core was non-planar, and spread out on both (1¯11) and (111) planes, while the metastable one was planar and spread out only on the (111) antiphase boundary plane. Three typical cores were identified for 1/2[¯101] super-partials which were separated by antiphase boundary on (010) planes. They were all non-planar. The most stable core again spread out on both the (1¯11) and (111) planes, while the metastable types spread out on either the (1¯11) or (111) plane.

Effect of Elastic Center on Dislocation Core Structure in Ni3Al. M.Wen, Lin, D.: Acta Materialia, 1997, 45[3], 1005-8