Abstract
WHILE reading the literature on diffraction of X-rays, I came across interesting photographs of X-ray patterns for a few metallic foils—aluminium, cadmium, copper, lead, silver, thallium, tin, zinc, and several kinds of brass—at different temperatures (Nishikawa and G. Asahara, Phys. Rev., 1920). The most interesting fact one finds from this paper is that there is a remarkable change in the nature of the pattern for a metal as time elapses after the rolling process. Silver and tin, for example, gave ill-defined patterns immediately after the rolling process, but these gradually changed during the following two or three weeks to the distinct spot patterns characteristic of annealed samples. Nishikawa and Asahara conclude from this that for these samples the crystal growth which accompanies annealing takes place at room temperatures.
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DEODHAR, G. X-ray Pattern of Metallic Crystals. Nature 123, 909 (1929). https://doi.org/10.1038/123909a0
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DOI: https://doi.org/10.1038/123909a0
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