The formation and strength of dislocation junctions in face-centered cubic crystals were calculated by using an orientation-dependent line tension model. The structures of the various types of junction which existed in face-centered cubic metals in the absence of an applied stress were examined with particular regard to the Lomer–Cottrell lock, the Hirth lock and the glissile junction. The so-called yield surface in stress space, corresponding to the dissolution of junctions, was determined. Although this model involved a drastic

simplification of dislocation physics, a comparison with more sophisticated models showed that it was possible to reproduce the structures of junctions as well as their responses to an applied stress. It was also in qualitative agreement with available experimental data. It was suggested that this simple model could provide useful parameters for junction strengths in higher-level models of single-crystal plasticity.

A Study of Dislocation Junctions in FCC Metals by an Orientation-Dependent Line Tension Model. L.Dupuy, M.C.Fivel: Acta Materialia, 2002, 50[19], 4873-85