Conference paper · Journal article
Direct observation of strain in bulk subgrains and dislocation walls by high angular resolution three-dimensional X-ray diffraction
Metal Structures in Four Dimensions, Materials Research Division, Risø National Laboratory for Sustainable Energy, Technical University of Denmark1
Materials Research Division, Risø National Laboratory for Sustainable Energy, Technical University of Denmark2
Risø National Laboratory for Sustainable Energy, Technical University of Denmark3
The X-ray diffraction (XRD) method "high angular resolution 3DXRD" is briefly introduced, and results are presented for a single bulk grain in a polycrystalline copper sample deformed in tension. It is found that the three-dimensional reciprocal-space intensity distribution of a 400 reflection associated with the grain, shows a distinct structure consisting of sharp bright peaks superimposed on a cloud of enhanced intensity.
The bright peaks (which arise from individual subgrains) are found to be subjected to backward strain (on average) while the fraction of the material giving rise to the cloud of enhanced intensity is subjected to forward strain. Based on the latter observation the, originally tentative, interpretation of the cloud as arising from dislocation walls is substantiated. (C) 2007 Elsevier B.V.
All rights reserved.
Language: | English |
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Year: | 2008 |
Pages: | 641-643 |
Proceedings: | 14th International Conference on the Strength of Materials |
ISSN: | 18734936 and 09215093 |
Types: | Conference paper and Journal article |
DOI: | 10.1016/j.msea.2006.12.168 |
ORCIDs: | Poulsen, Henning Friis and Pantleon, Wolfgang |