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

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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
DOIs
Publication statusPublished - May 2010
Externally publishedYes

Keywords

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

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