In recent years, there was a renewed interest in studying the cross-slip of screw dislocations in the simple face-centred cubic structure. This paper serves to address parallel developments in modelling the cross-slip of screw dislocations in the body-centred cubic structure and the ordered L12 structure. In the latter two cases, the dislocation cores have non-planar spreading offering high intrinsic Peierls stresses. The flow behaviours of these materials, such as the non-Schmid behaviour and temperature-dependence of flow stress, were largely due to the behaviours of single dislocations. 3D atomistic modelling of the minimum-energy path for the glide processes in these cases was performed with an aim to reconcile with experimentally determined activation energies for slip.

Non-Planar Dislocations - 3D Models and Thermally-Activated Glide Processes. A.H.W.Ngan: Materials Science and Engineering A, 2005, 400-401, 25-36