Purely stress-driven interactions between 60° non-screw lattice dislocation and coherent twin boundaries were considered. Depending upon the material and the applied strain, slip was observed to interact with the boundary in different ways. If a 60° dislocation was forced, by an external stress, into a coherent twin boundary, it dissociated into different partial dislocations gliding into the twin as well as along the twin boundary. A sessile dislocation lock could be generated at the coherent twin boundary if the transited slip was incomplete. The details of the interaction were controlled by the material-dependent energy barriers for the formation of Shockley partial dislocations from the site where the lattice dislocation impinged upon the boundary.

Interactions between Non-Screw Lattice Dislocations and Coherent Twin Boundaries in Face-Centered Cubic Metals. Z.H.Jin, P.Gumbsch, K.Albe, E.Ma, K.Lu, H.Gleiter, H.Hahn: Acta Materialia, 2008, 56[5], 1126-35