THE EFFECT OF DIFFUSION ANISOTROPY ON DISLOCATION BIAS AND IRRADIATION CREEP IN CUBIC LATTICE MATERIALS

Point defect currents to straight edge dislocations in fcc and bcc lat tices are calculated taking into account the strain-induced diffusion anisotropy (elastodiffusion) of point defects in combined strain field s from dislocations and external loads. The dislocation bias factors a re shown to depend on dislocation orientation with respect to the latt ice symmetry axes and the direction of external load. The implications of the orientational dependence of bias factors for the dislocation l oop kinetics, swelling and irradiation creep in cubic lattices are dis cussed.