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- W4246642272 abstract "Abstract The debris component of the dislocation substructure in copper single crystals deformed at 78 K was studied by weak-beam transmission electron microscopy. The following defects were identified: primary unfaulted dipoles, faulted dipoles, stacking-fault tetrahedra and defect clusters. It is shown that all these defects can be derived from primary dislocations. The distribution of dipole sizes as a function of flow stress suggests that they are refined by chopping as deformation proceeds; so just before fracture their lengths vary from 30 nm down to vanishingly small loops. The size distribution of stacking-fault tetrahedra shows a small dependence upon the degree of deformation and suggests that some equilibrium size of these defects is established in the presence of the other elements of the substructure. Small dot-like clusters of dimension below 2nm are most probably the remains of larger entities that have shrunk during warm-up to room temperature. Rearrangement of the structure, which occurs between 78 K and room temperature, may to a large degree explain the observed changes in electrical resistivity described in previous work by Niewczas et al." @default.
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- W4246642272 date "2002-01-11" @default.
- W4246642272 modified "2023-09-26" @default.
- W4246642272 title "Transmission electron microscopy observations of debris structure in deformed copper single crystals" @default.
- W4246642272 doi "https://doi.org/10.1080/01418610110070262" @default.
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