The stability of short-range reactions between 2 dislocations with parallel line vectors which glided on parallel slip planes in body-centered cubic crystals was determined. The dislocations were assumed to be infinitely long, and their interaction was treated as being elastic. The interaction and self-energies were estimated, and the dependence upon dislocation velocity was taken into account. The stability of the reaction was determined as a function of the relative angle, relative speed, dislocation mobility, Burgers vector, separation of slip planes and external force. The results indicated that the dynamic formation of dislocation dipoles or tilt-wall embryos occurred only over a narrow range in the investigated phase space. Inertial effects were shown to be important at low separations because of the large force between the 2 dislocations which comprised the dipole or tilt-wall embryo. Destabilization of the dislocation dipoles, or tilt-wall embryos, was enhanced by externally applied stresses or by the stress fields of neighboring dislocations.

Stability of Dislocation Short-Range Reactions in BCC Crystals. H.Huang, N.Ghoniem, T.D.de la Rubia, M.Rhee, H.Zbib, J.Hirth: Journal of Engineering Materials and Technology, 1999, 121[2], 143-50