Abstract
LONDON. Royal Society, November 4.—H. C. H. Carpenter and S. Tamura: Experiments on the production of large copper crystals. Crystals exceeding 4 in. in length have been grown in polycrystalline copper strip of section 0.5 in. × 0.125 in. by the method of critical strain followed by appropriate heat treatment. These crystals, however, are not, strictly speaking, single crystals, since they contain numerous twins which may be oriented in so many as three directions. It has not been found possible to produce large copper crystals by this method without at the same time producing twins. The complete removal of strain in recrystallised copper strip is only achieved by prolonged heating. On account of the presence of twins, the large crystals thus prepared only possess about one-third of the ductility of polycrystalline copper. Their tenacity, however, is almost the same. Their ductility is still more inferior to that of single-crystal copper prepared direct from the liquid which is free from twins.
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Societies and Academies. Nature 118, 717–719 (1926). https://doi.org/10.1038/118717a0
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DOI: https://doi.org/10.1038/118717a0