Cross slip and the plastic deformation of NaCl single and polycrystals at high pressure

摘要: Abstract The pressure dependence of the [sgrave]–e curve for NaCl single crystals deformed in compression has been determined pressures ranging to 10 kb at room temperature. Under stress onset third stage deformation, [sgrave] III decreases linearly by 7 10% per kb, while II, is independent; II expected vanish vicinity 10–13 kb. If due abundant, thermally activated cross slip screw dislocations, then evidently enhances slip. This believed result from a pressure-induced increase stacking-fault energy, γ 110, a/2 〈110〉 dislocations on {110} planes. ductility polycrystals temperature substantially increased under and flow stress, [sgrave], given strain reduced about 20% It that ease high accounts reductio...