Comparison of quartz crystallographic preferred orientations identified with optical fabric analysis, electron backscatter and neutron diffraction techniques

N. J.R. Hunter, C. J.L. Wilson, Vladimir Luzin

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10 Citations (Scopus)

Abstract

Three techniques are used to measure crystallographic preferred orientations (CPO) in a naturally deformed quartz mylonite: transmitted light cross-polarized microscopy using an automated fabric analyser, electron backscatter diffraction (EBSD) and neutron diffraction. Pole figure densities attributable to crystal-plastic deformation are variably recognizable across the techniques, particularly between fabric analyser and diffraction instruments. Although fabric analyser techniques offer rapid acquisition with minimal sample preparation, difficulties may exist when gathering orientation data parallel with the incident beam. Overall, we have found that EBSD and fabric analyser techniques are best suited for studying CPO distributions at the grain scale, where individual orientations can be linked to their source grain or nearest neighbours. Neutron diffraction serves as the best qualitative and quantitative means of estimating the bulk CPO, due to its three-dimensional data acquisition, greater sample area coverage, and larger sample size. However, a number of sampling methods can be applied to FA and EBSD data to make similar approximations.

Original languageEnglish
Pages (from-to)169-184
Number of pages16
JournalJournal of Microscopy
Volume265
Issue number2
DOIs
Publication statusPublished - 1 Feb 2017

Keywords

  • crystallographic preferred orientation
  • electron backscatter diffraction (EBSD)
  • fabric analyser
  • microstructure
  • neutron diffraction
  • strain analysis
  • texture

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