The orientation dependence of elastic interaction between a stacking fault tetrahedron and mobile dislocations was investigated for the possibility of unfaulting and subsequent absorption of the stacking fault tetrahedron. The obtained result indicated that 60° dislocations have stronger interaction with the spontaneously truncated stacking fault tetrahedron than pure screws or edges. Due to the high activation energy, the collapse and absorption of the stacking fault tetrahedra seemed to be limited to cases where the approaching dislocations along <110> directly cut the stacking fault tetrahedra symmetrically. The anisotropic energetics could contribute to the spatially limited growth of defect-cleared channels observed in the irradiated materials.

Orientation Dependent Elastic Interaction between a Truncated Stacking Fault Tetrahedron and a Glissile Dislocation. M.Hiratani, V.V.Bulatov, H.M.Zbib: Journal of Nuclear Materials, 2004, 329-333[2], 1103-6