A cross-slip deformation-twinning model was proposed which was based upon experimental in situ deformation of Cu–Ge alloys in a transmission electron microscope. During deformation Shockley partials were emitted, from the grain boundaries, which encountered an obstacle within the grain and split to give deformation twins in the cross-slip as well as the primary planes. Upon further deformation, a thickening of the twins was directly observed. The proposed model provided a dislocation mechanism for the observed simultaneous twin thickening in the cross-slip and primary planes.

Self-Thickening, Cross-Slip Deformation Twinning Model. J.Narayan, Y.T.Zhu: Applied Physics Letters, 2008, 92[15], 151908