Journal article · Conference paper
Microstructure of individual grains in cold-rolled aluminium from orientation inhomogeneities resolved by electron backscattering diffraction
Risø National Laboratory for Sustainable Energy, Technical University of Denmark1
Metal Structures in Four Dimensions, Materials Research Division, Risø National Laboratory for Sustainable Energy, Technical University of Denmark2
Materials Research Division, Risø National Laboratory for Sustainable Energy, Technical University of Denmark3
The deformation structure within individual grains of a deformed material is resolved by electron backscattering diffraction. The employed evaluation scheme for local orientation data is illustrated on cold-rolled aluminium. The orientation distribution of each grain is characterized by an averaged orientation spread and its anisotropy; the dependence of both parameters on grain size and grain orientation is discussed.
The preferred rotation axis in each grain is determined and shows a dominant orientation spreading around the transversal direction. Characteristic features of the deformation structure (as alternating orientation differences or orientation gradients) are resolved from sign-carrying disorientation angles defined with respect to the preferred rotation axis in each grain.
Five components of the dislocation density tensor - corresponding to part of the geometrically necessary dislocation content - are inferred from the local curvatures. The spatially inhomogeneous distribution of the dislocation density offers a new possibility for identifying dislocation boundaries. (C) 2007 Elsevier B.V.
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Language: | English |
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Year: | 2008 |
Pages: | 21-27 |
Proceedings: | Symposium on Advances in Microstructure-Based Modeling and Characterization of Deformation Microstructures : TMS 2007 Annual Meeting |
ISSN: | 18734936 and 09215093 |
Types: | Journal article and Conference paper |
DOI: | 10.1016/j.msea.2007.10.092 |
ORCIDs: | Pantleon, Wolfgang |