Effect of alloying Re and Ru in the edge-dislocation core of the Ni/Ni₃Al interface

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 show that both elements can stabilize the 110(001) dislocation core. In the dislocation core region, Re and Ru prefer to substitute for Ni on the site in the \gamma-phase. Re is easier to segregate into the dislocation core region as compared with Ru; it especially prefers to substitute for Ni on the \gamma-(Ni)1 site.