Attention was focused upon modelling the behavior of single crystals in stage-0. The latter was characterized by a high activity of edge dislocations, and the relative inactivity of screw dislocations. The growth in dislocation density was investigated by using dislocation dynamics simulations and a dislocation density-based continuum model for single-crystal plasticity. Although not all of the material constants which were required by the continuum model could be determined, due to the limited strain histories considered, interpretation of the dislocation dynamics simulations by using a dislocation mechanics-based continuum plasticity model permitted the deduction of the scaling laws which controlled the growth in dislocation density.

Simulations of the Growth of Dislocation Density during Stage-0 Deformation in BCC Metals. A.Arsenlis, M.Tang: Modelling and Simulation in Materials Science and Technology, 2003, 11[2], 251-64