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Extracting grain-orientation-dependent data from in situ time-of-flight neutron diffraction. I. Inverse pole figures

Journal of Applied Crystallography, ISSN: 1600-5767, Vol: 47, Issue: 6, Page: 2019-2029
2014
  • 17
    Citations
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  • 24
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Metrics Details

  • Citations
    17
    • Citation Indexes
      17
  • Captures
    24

Article Description

The problem of calculating the inverse pole figure (IPF) is analyzed from the perspective of the application of time-of flight neutron diffraction to in situ monitoring of the thermomechanical behavior of engineering materials. On the basis of a quasi-Monte Carlo (QMC) method, a consistent set of grain orientations is generated and used to compute the weighting factors for IPF normalization. The weighting factors are instrument dependent and were calculated for the engineering materials diffractometer VULCAN (Spallation Neutron Source, Oak Ridge National Laboratory). The QMC method is applied to face-centered cubic structures and can be easily extended to other crystallographic symmetries. Examples include 316LN stainless steel in situ loaded in tension at room temperature and an Al-2%Mg alloy, substantially deformed by cold rolling and in situ annealed up to 653 K.

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