Dislocation glide in model Ni(Al) solid solutions by molecular dynamics

The glide of an edge dislocation, in a random solid solution, Ni (1 to 8 at % Al), is simulated by molecular dynamics (MD). An embedded atom method potential has been optimized to reproduce the relevant properties of the face centered cubic solid solution and of the L12 Ni3Al phase. Glide is studied at fixed temperature and applied stress. Three parameters are found to be necessary to describe the rate of shear as a function of applied shear …