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Three-dimensional X-ray diffraction imaging of dislocations in polycrystalline metals under tensile loading

Author

Listed:
  • Mathew J. Cherukara

    (Argonne National Laboratory
    Argonne National Laboratory)

  • Reeju Pokharel

    (Los Alamos National Laboratory)

  • Timothy S. O’Leary

    (Center for Integrated Nanotechnologies, Los Alamos National Laboratory)

  • J. Kevin Baldwin

    (Center for Integrated Nanotechnologies, Los Alamos National Laboratory)

  • Evan Maxey

    (Argonne National Laboratory)

  • Wonsuk Cha

    (Argonne National Laboratory)

  • Jorg Maser

    (Argonne National Laboratory)

  • Ross J. Harder

    (Argonne National Laboratory)

  • Saryu J. Fensin

    (Los Alamos National Laboratory)

  • Richard L. Sandberg

    (Center for Integrated Nanotechnologies, Los Alamos National Laboratory)

Abstract

The nucleation and propagation of dislocations is an ubiquitous process that accompanies the plastic deformation of materials. Consequently, following the first visualization of dislocations over 50 years ago with the advent of the first transmission electron microscopes, significant effort has been invested in tailoring material response through defect engineering and control. To accomplish this more effectively, the ability to identify and characterize defect structure and strain following external stimulus is vital. Here, using X-ray Bragg coherent diffraction imaging, we describe the first direct 3D X-ray imaging of the strain field surrounding a line defect within a grain of free-standing nanocrystalline material following tensile loading. By integrating the observed 3D structure into an atomistic model, we show that the measured strain field corresponds to a screw dislocation.

Suggested Citation

  • Mathew J. Cherukara & Reeju Pokharel & Timothy S. O’Leary & J. Kevin Baldwin & Evan Maxey & Wonsuk Cha & Jorg Maser & Ross J. Harder & Saryu J. Fensin & Richard L. Sandberg, 2018. "Three-dimensional X-ray diffraction imaging of dislocations in polycrystalline metals under tensile loading," Nature Communications, Nature, vol. 9(1), pages 1-6, December.
    • Handle: RePEc:nat:natcom:v:9:y:2018:i:1:d:10.1038_s41467-018-06166-5
    DOI: 10.1038/s41467-018-06166-5
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    Cited by:

    1. Ahmed H. Mokhtar & David Serban & Daniel G. Porter & Frank Lichtenberg & Stephen P. Collins & Alessandro Bombardi & Nicola A. Spaldin & Marcus C. Newton, 2024. "Three-dimensional domain identification in a single hexagonal manganite nanocrystal," Nature Communications, Nature, vol. 15(1), pages 1-9, December.

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