A transmission electron microscope study of thin foils of copper
The differences in the mechanical properties of different f. c. c. metals have been explained by Seeger (1) by the differences in the stacking-fault energy of these metals. Copper has a low stacking-fault energy and therefore the partial dislocations will be widely separated. As a consequence the mechanical properties depend on the properties of the partials and, because the climbing of partials is difficult, it has been suggested (1) that polygonisation of copper is not possible. The present investigation has therefore been undertaken to study this problem experimentally and to obtain a better understanding of the recovery process of a f. c. c. metal with low stacking-fault energy.
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