Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1581945 | Materials Science and Engineering: A | 2008 | 7 Pages |
Abstract
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.
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Physical Sciences and Engineering
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Authors
W. He, W. Ma, W. Pantleon,