A simple model for the cross-slip of ½<111> super-partials in B2 intermetallics was analyzed with regard to the anomalous flow stress increase. The orientational dependence of the forces which acted upon the fractional dislocations of the threefold-split screw super-partials in the body-centered cubic-based lattice, due to an uniaxial tensile stress, was studied. The critical stress which was necessary in order to keep the dislocation in motion was calculated to be the stress at which locking of the super-partial was as equally likely as its unlocking. It was concluded that cross-slip events played a significant role, but that this did not imply that other non-conservative dislocation processes could be ruled out.

Cross-Slip of Super-Partial Dislocations in Iron Aluminides. V.Paidar: Philosophical Magazine A, 2001, 81[5], 1065-77