High Resolution Mapping of Orientation and Strain Gradients in Metals by Synchrotron 3D X-ray Laue Microdiffraction

Yubin Zhang*, Rozaliya I. Barabash

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

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Abstract

Synchrotron 3D X-ray Laue microdiffraction, available at beamline 34-ID-E at Advanced Photon Source in Argonne National Laboratory, is a powerful tool for 3D non-destructive mapping of local orientations and strains at sub-micron scale in the bulk. With this technique, it is possible to study local residual stresses developed during manufacturing or while in service due to interactions between, for example, different phases and/or grains with different orientations in materials containing multiple or single phase(s). Such information is essential for understanding mechanical properties and designing advanced materials, but is largely non-existent in the current generation of materials models. In the present paper, the principle and experimental set-up of the 3D microdiffraction are introduced, followed by a description of a method for quantification of the local plastic deformation based on high-angular-resolution orientation maps. The quantification of local residual stresses in two model materials, ductile cast iron (two phases) and partially recrystallized pure nickel (single phase), using 3D microdiffraction will then be presented. The results show that 3D microdiffraction is important for understanding the origin of local residual stresses and to relate them to the microstructural evolution. Finally, the limitations of the 3D microdiffraction on the current generation synchrotron source and new possibilities after the synchrotron upgrade are discussed.
Original languageEnglish
Article number6
JournalQuantum Beam Science
Volume3
Issue number1
Number of pages14
ISSN2412-382x
DOIs
Publication statusPublished - 2019

Keywords

  • 3D X-ray laue microdiffraction
  • Orientation maps
  • Residual stresses
  • Geometrically necessary dislocation (GND)
  • Ductile cast iron
  • Pure nickel
  • Recrystalization

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