Hardening in cadmium resulting from pyramidal glide

Abstract

Cadmium single crystals prestrained on the pyramidal glide systems at 293 K have been tested in shear on the basal plane at 77 K. The strain rate sensitivity of the flow stress on the basal system after pyramidal hardening was found to be lower than it is in an uninterrupted test on the basal plane, indicating that pyramidal dislocations provide obstacles to slip of longer range than those introduced during a normal tensile test.