Observations of Dislocations in Cu/Nb Nanolayer Composites After Deformation
- 1 August 1997
- journal article
- Published by Springer Nature in Journal of Materials Research
- Vol. 12 (8) , 1939-1941
- https://doi.org/10.1557/jmr.1997.0264
Abstract
Dislocations have been observed in deformed Cu/Nb nanolayer composites of wavelength 17 and 7 nm. The dislocations thread through the Cu/Nb interfaces even though there is a change of Burgers vector. Conventional and high resolution transmission electron microscopy studies show that the in-plane bowing direction of these dislocations in the Cu layers is opposite to that in the Nb layers, so that the dislocations appear to zig-zag. These observations are explained by the presence of residual tensile stresses in Cu and residual compressive stresses in Nb, which make dislocations bow in opposite directions in the alternating layers.Keywords
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