Computer simulation of carbon diffusion near b/2[010](001) dislocation in cementite

Partial contributions U i to the activation energy for the diffusion of carbon atoms in the Fe3C lattice have been calculated. The U i values have been compared upon the migration of carbon atoms in the ideal lattice, near the stacking-fault plane, and near the core of a partial edge dislocation with a Burgers vector b/2[010]. The most preferable ways of the migration of carbon atoms near the studied structural defects in the (001) cementite plane have been revealed. The values of the stacking-fault energy in this plane have been calculated. The possibility of splitting the dislocation with a Burgers vector b/2[010] into two partial dislocations has been shown.