Fig. 8: Plastic strain during relaxation and dislocation mobility law in 3D-DDD simulations.
a Plastic strain during relaxation for a simulation with an initial dislocation density of ρ0 = 2.5 × 1013 m−2 in bulk copper. Insets show the initial dislocation configuration and relaxed configuration with dislocation junctions formed by reactions among the initially present dislocations. b Dislocation velocity versus resolved shear stress for an edge dislocation as predicted from MD simulations47, and the exponential dislocation mobility law shown in Eq. (9). Screw dislocation mobility is assumed equal to edge dislocation mobility. DDD is abbreviation of discrete dislocation dynamics and MD is molecular dynamics.
