Based upon the general theory of dislocations and kinks, 3 kink models were constructed which corresponded to the ½<111>{011} and ½<111>{112} edge dislocations, in body-centred cubic Fe, by using the molecular dynamics method. It was found that the geometrical structure of a kink depended upon the type of edge dislocation and the structural energies of the atom sites in the dislocation-core region, as well as the geometrical symmetry of the dislocation core and the characteristic of the stacking sequence of atomic plane along the dislocation line. The formation energies and widths of the kinks on the ½<111>{011} and ½<111>{112} edge dislocations were calculated. The formation energies were 0.05 and 0.04eV, and the widths were 6.02b and 6.51b, respectively. The low formation-energies indicated that the formation of a kink in the edge dislocation was very easy in body-centred cubic Fe.

Atomistic Simulation of Kink Structure on Edge Dislocation in BCC Iron. L.Q.Chen, C.Y.Wang, T.Tao: Chinese Physics B, 2008, 17[2], 662-8