Lattice rotations of individual bulk grains. Part 1: 3D X-ray characterization

H.F. Poulsen, L. Margulies, S. Schmidt, G. Winther

    Research output: Contribution to journalJournal articleResearchpeer-review

    Abstract

    Three-dimensional X-ray diffraction has been applied to characterise the plastic deformation of individualgrains deeply embedded in a 99.6% pure aluminium specimen. The specimen is 4 mm thick with an average grain size of 75 μm. The average latticerotation for each grain as well as the degree of internal orientation spread within the grain is measured in-situ during 6% elongation. The rotation paths for 95 grains with nearly random initial orientations are reported. The quality of this data set is sufficient to make distinctions between plasticity models. The rotation paths exhibit a clear dependence on the initial orientation, while the influence of grain interaction is relatively small. All grains deform plastically. Averaged over grains and reflections the rotation of the tensile axis and the FWHM of the internal spread is 2.0 and 0.8°, respectively, at 6% strain.
    Original languageEnglish
    JournalActa Materialia
    Volume51
    Issue number13
    Pages (from-to)3821-3830
    ISSN1359-6454
    DOIs
    Publication statusPublished - 2003

    Keywords

    • Plastic deformation
    • X-ray diffraction
    • Aluminium
    • Texture
    • Synchroton radiation

    Cite this