Investigations of alloying Re and Ru in the [110](001) dislocation core of the Ni/Ni3Al interface were conducted within the framework of density functional theory. The energetic calculations showed that both elements could stabilize the [110](001) dislocation core. In the dislocation core region, Re and Ru preferred to substitute for Ni on the site in the γ-phase. Re was easier to segregate into the dislocation core region as compared with Ru; it especially preferred to substitute for Ni on the γ-(Ni)1 site.

Effects of Alloying Re and Ru in the Edge-Dislocation Core of the Ni/Ni3Al Interface. Wang, C., Wang, C.Y.: Chinese Physics B, 2009, 18[9], 3928-33