The interaction of dissociated lattice dislocations with a near-Σ = 3 grain boundary was investigated by means of transmission electron microscopy, using the weak-beam technique; combined with bright-field image matching. The results showed that Shockley partials were required to recombine, upon entering a grain boundary, so as to form an absorbed perfect lattice dislocation. Decomposition of the latter into 2 displacement shift complete products then occurred. Complex reactions between displacement shift complete dislocations yielded further stress relaxation. The role played by the stacking-fault energy, in dislocation and grain boundary interactions, was pointed out.

On the Interactions between Dislocations and a Near Σ = 3 Grain Boundary in a Low Stacking-Fault Energy Metal. J.P.Couzinié, B.Decamps, L.Priester: Philosophical Magazine Letters, 2003, 83[12], 721-31