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Recovering the Full Dislocation Tensor from High-Resolution EBSD Microscopy

T. HARDIN, B.L. ADAMS, D.T. FULLWOOD

Abstract


A novel stereological method is reported which infers experimentally inaccessible components of the Nye geometrically necessary dislocation density tensor. It is possible to measure five of nine components of the Nye tensor by high-resolution electron backscatter diffraction (HR-EBSD), but electron-opacity of metals obscures the remaining four components. This paper illustrates that it is possible to use equilibrium equations in connection with the known (measured) strain field of dislocations to infer the four unknown dislocation density components. Once the full Nye tensor is obtained, it can be transformed into a crystal coordinate frame and interpreted in a physical se

Keywords


EBSD, Nye, Dislocation Density, HR-EBSDText

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