The nucleation and growth of deformation twins was considered; assuming that twinning occurred via the double cross-slip mechanism. Dislocation dissociation occurred and gave rise to a stationary partial and a twinning partial. Twin growth involved the twinning partial undergoing double cross-slip. Three specific geometries were considered. Firstly, the dissociation of a perfect dislocation into 3 co-linear partials with equal Burgers vectors. This described twinning in body-centered cubic metals. Secondly, there was the dissociation of a perfect dislocation into 2 co-linear partials with differing Burgers vectors. Thirdly, there was the dissociation of a perfect dislocation into 2 non co-linear Shockley partials. The double cross-slip mechanism easily explained the formation of emissary dislocations at the twin/matrix interfaces of deformation twins in body-centered cubic metals.

Nucleation and Growth of Deformation Twins - a Perspective Based on the Double Cross-Slip Mechanism of Deformation Twinning. K.P.D.Lagerlöf, J.Castaing, P.Pirouz, A.H.Heuer: Philosophical Magazine A, 2002, 82[15], 2841-54