Abstract
Single crystals containing from 0.5 to 10.0 at. % Al in Copper have been strained in single glide at room temperature to just past the yield point. The density of primary dislocations in slip bands has been measured by etch-pitting the cross glide plane deep within the crystal after this plane had been exposed by sectioning. The density of primary dislocations was found to vary with the square of the yield stress. This is consistent with latent hardening measurements made earlier. It is suggested that the onset of secondary slip, and the consequent termination of slip band formation in these crystals is controlled mainly by internal stresses due to the accumulation of primary dislocations.
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