Non-destructive analysis of micro texture and grain boundary character from X-ray diffraction contrast tomography

A. King, M. Herbig, W. Ludwig, P. Reischig, Erik Lauridsen Mejdal, T. Marrow, J.Y. Buffière

    Research output: Contribution to journalJournal articleResearchpeer-review

    Abstract

    Recent advances in synchrotron based X-ray imaging and diffraction techniques offer interesting new possibilities for mapping 3D grain shapes and crystallographic orientations in different classes of polycrystalline materials. X-ray diffraction contrast tomography (DCT) is a monochromatic beam imaging technique combining the principles of X-ray micro-tomography and three-dimensional X-ray diffraction microscopy (3DXRD). DCT provides simultaneous access to 3D grain shape, crystallographic orientation and attenuation coefficient distribution at the micrometer length scale. The microtexture of the material can be quantified in more detail by post-processing of the volume data provided by DCT. In particular one can determine the local crystallographic habit plane of the grain boundary by analysing the surface normal of the grain boundary with respect to the crystal orientation. The resulting five parameter description of the character of individual grain boundaries could previously be produced only by destructive characterization techniques. Statistical analysis of this kind of data can be expected to provide new insight into various physico-chemical processes, driven by the grain boundary energy (corrosion, coarsening).
    Original languageEnglish
    JournalNuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms
    Volume268
    Issue number3-4
    Pages (from-to)291-296
    ISSN0168-583X
    DOIs
    Publication statusPublished - 2010

    Keywords

    • Materials characterization and modelling
    • Materials and energy storage

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