3-D growth of a short fatigue crack within a polycrystalline microstructure studied using combined diffraction and phase-contrast X-ray tomography

M. Herbig, Andrew King, Peter Reischig, Henry Proudhon, Erik Mejdal Lauridsen, James Marrow, Jean-Yves Buffière, Wolfgang Ludwig

    Research output: Contribution to journalJournal articleResearchpeer-review

    Abstract

    X-ray diffraction contrast tomography is a recently developed, non-destructive synchrotron imaging technique which characterizes microstructure and grain orientation in polycrystalline materials in three dimensions. By combining it with propagation-based phase-contrast tomography it is possible to get a full picture description for the analysis of local crack growth rate of short fatigue cracks in three dimensions: the three-dimensional crack morphology at different propagation stages, and the shape and orientation of the grains around the crack. An approach has been developed on the metastable beta titanium alloy Ti 21S that allows for visualization and analysis of the growth rate and crystallographic orientation of the fracture surface.
    Original languageEnglish
    JournalActa Materialia
    Volume59
    Issue number2
    Pages (from-to)590-601
    ISSN1359-6454
    DOIs
    Publication statusPublished - 2011

    Keywords

    • Materials characterization and modelling
    • Materials and energy storage

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