A nodal dislocation dynamics model was developed in order to simulate plastic processes in face-centred cubic crystals. The model explicitly accounted for all of the slip systems and Burgers vectors observed in face-centred cubic systems, including stacking faults and partial dislocations. Simple conservation rules were derived which rigorously described all of the partial dislocation interactions and permitted the modelling and quantification of cross-slip processes, the structure and strength of dislocation junctions and the formation of face-centred cubic-specific structures such as stacking fault tetrahedra. The dislocation dynamics framework was built upon isotropic non-singular linear elasticity and supported by information at the atomistic scale. In this way, the connection between the meso and micro scales was attained self-consistently, with all of the material parameters fitted to atomistic data. A series of simulations was performed, including dislocation reactions and dissociations and dislocation junction strength. In addition, the 4-dimensional stress space relevant to cross-slip was mapped.

Atomistically Informed Dislocation Dynamics in FCC Crystals. E.Martínez, J.Marian, A.Arsenlis, M.Victoria, J.M.Perlado: Journal of the Mechanics and Physics of Solids, 2008, 56[3], 869-95