Diffraction post-processing of 3D dislocation dynamics simulations for direct comparison with micro-beam Laue experiments

Felix Hofmann, Sinéad Keegan, Alexander M. Korsunsky

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)

Abstract

We present a method of computing lattice rotations and elastic strains due to 3D dislocation structures discretised into straight segments. Combined with ray-tracing, it enables virtual scattering experiments where X-ray diffraction patterns that would arise from such dislocation structures are simulated. We demonstrate the diffraction post-processing of a Frank-Read source simulated using the ParaDiS discrete dislocation dynamics code. This simulation is compared to experimental synchrotron X-ray micro-beam Laue diffraction measurements of a single grain within a deformed nickel polycrystal. The simulated pattern captures the experimentally observed anisotropic broadening of Laue reflections and illustrates that heterogeneous and anisotropic lattice (re)orientation effects dominate the peak shape.

Original languageEnglish
Pages (from-to)66-69
Number of pages4
JournalMaterials Letters
Volume89
DOIs
Publication statusPublished - 15 Dec 2012
Externally publishedYes

Keywords

  • Defects
  • Dislocation dynamics simulations
  • Synchrotron micro-beam Laue diffraction

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