Electron backscatter diffraction study of dislocation content of a macrozone in hot-rolled Ti-6Al-4V alloy

T. Ben Britton*, Soran Birosca, Michael Preuss, Angus J. Wilkinson

*Corresponding author for this work

    Research output: Contribution to journalArticlepeer-review

    Abstract

    We compare the dislocation substructure within macrozone and non-macrozone regions of hot-rolled Ti-6Al-4 V. Hough-based and cross-correlation-based analysis of electron backscatter diffraction (EBSD) patterns are used to establish the grain orientations and intra-granular misorientations, respectively. The set of geometrically necessary dislocations (GNDs) that support measured lattice curvatures and minimize the total GND line energy are calculated. The GND content in the macrozone is approximately twice that in the non-macrozone region, and 〈a〉 GNDs are present at densities ∼10 times higher than 〈c + a〉 GNDs.

    Original languageEnglish
    Pages (from-to)639-642
    Number of pages4
    JournalScripta Materialia
    Volume62
    Issue number9
    Early online date11 Jan 2010
    DOIs
    Publication statusPublished - 1 May 2010

    Keywords

    • Dislocation structure
    • Electron backscatter diffraction (EBSD)
    • Macrozone
    • Rolling
    • Titanium alloys

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