Using in situ nano-indentation, a study was made of the migration mechanisms of Σ3{112} incoherent twin boundary in epitaxial nanotwinned Cu films. Incoherent twin boundaries migrated via the propagation of steps or disconnections with step heights of three or multiples of three {111} interplanar distances, and the migration may lead to the de-twinning of nanotwins. The transmission of a glide dislocation across an incoherent twin boundary was shown to form a sessile dislocation in the incoherent twin boundary and locally pin the boundary at the site of the slip transmission

Influence of Slip Transmission on the Migration of Incoherent Twin Boundaries in Epitaxial Nanotwinned Cu. N.Li, J.Wang, J.Y.Huang, A.Misra, X.Zhang: Scripta Materialia, 2011, 64[2], 149-52