The Impact of Interstitial Carbon on Dislocation Motion in the alpha-Fe Lattice

The effect of the introduction of interstitial carbon into the ?-Fe lattice on the behavior of dislocation cores is presented. The simulations carried out were based on an EAM formulation that generated stress cycles resulting from the movement of dislocations, caused by the rigid displacement of rows of atoms on one side of a slip plane. The “path of least resistance” (POLR) mechanism accounting for stress evolution at the dislocation core was applied to predict the Peierls stress. This paper presents the behavior of the edge and screw dislocations in the Fe-C lattice.