Dislocation motion in short-range-ordered solid solutions under stress were investigated in situ by transmission electron microscopy. For the first time, local reordering created by the back slip of mobile dislocations was proven to exist. Dislocation movement within pile-ups produces local disordering by forward slip during loading, and local reordering by back slip during unloading. Within a pile-up, the driving force for this mechanism was the diffuse antiphase-boundary energy created by the movement of the leading dislocation.

Local Disordering and Reordering Phenomena Induced by Mobile Dislocations in Short-Range Ordered Solid Solutions. F.Pettinari-Sturmel, M.Jouiad, H.O.K.Kirchner, N.Clément, A.Coujou: Philosophical Magazine A, 2002, 82[16], 3045-54