F. Pettinari-Sturmel, M. Jouiad, H. Kirchner, N. Clément, A. Coujou
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Local disordering and reordering phenomena induced by mobile dislocations in short-range-ordered solid solutions
Abstract Dislocation motion in short-range-ordered solid solutions under stress are investigated in situ by transmission electron microscopy. For the first time, local reordering created by the back slip of mobile dislocations is 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 is the diffuse antiphase-boundary energy created by the movement of the leading dislocation.
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