Abstract
Pure silver and aluminum were cold-worked by making filings under liquid nitrogen. These filings were maintained at −160°Cthroughout the measurements. Cold-worked silver shows a peak-shift and an asymmetric peak broadening which can be explained by the presence of deformation stacking faults and twin stacking faults on the (111) planes. An appreciable part of the small, anisotropic particle-size broadening results directly from stacking faults. These faults anneal out in the range of 0° to 100°C. Cold-worked aluminum filings, even made under liquid nitrogen, show no peak-shift or asymmetry indicating that the stacking-fault density must be very low in this material. However, there is a peak broadening indicating an appreciable particle size and strain broadening, both of which are isotropic.
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