The results of atomistic simulations of the interactions between an edge dislocation and 3 symmetrical tilt grain boundaries in body-centred cubic W were presented. The simulations revealed that the outcome of the dislocation/grain-boundary interaction depended sensitively upon the grain-boundary structure, the geometry of the slip systems in neighbouring grains and the precise location of the interaction within the grain boundary. A detailed analysis was made of the evolution of the grain-boundary structures and local stress fields during dislocation absorption and transmission.

Atomistic Simulations of Interactions between the ½<111> Edge Dislocation and Symmetric Tilt Grain Boundaries in Tungsten. Y.Cheng, M.Mrovec, P.Gumbsch: Philosophical Magazine, 2008, 88[4], 547-60