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Low-angle subgrain misorientations in deformed NaCl.

G M Pennock1, M R Drury

  • 1Department of Earth Sciences, Faculty of Geosciences, Utrecht University, Postbus 80.021, 3508 TA Utrecht, The Netherlands. gpennock@geo.uu.nl

Journal of Microscopy
|February 3, 2005
PubMed
Summary

Strain influences subgrain boundary misorientations in sodium chloride (NaCl) polycrystals. A power law links low strain levels to average misorientations, with texture and grain size playing a role.

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Area of Science:

  • Materials Science
  • Crystallography
  • Solid Mechanics

Background:

  • Subgrain boundary misorientations are critical microstructural features affecting material properties.
  • Understanding their evolution with strain is essential for predicting material behavior under stress.

Purpose of the Study:

  • To investigate the relationship between strain and subgrain boundary misorientations in NaCl polycrystals.
  • To assess the accuracy and influencing factors of this relationship.

Main Methods:

  • Deformation of NaCl polycrystals in compression.
  • Analysis of subgrain boundary misorientations using electron backscattered diffraction (EBSD).

Main Results:

  • A power law relationship was identified between strain and average misorientations at low strains.

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  • The accuracy of this relationship is dependent on material and EBSD processing parameters.
  • Grain orientation and texture significantly influence average misorientations, especially in materials with high plastic anisotropy.
  • A minor dependency of average misorientations on grain size was observed.

    • Conclusions:

    • The power law relationship provides a useful model for low-strain deformation in NaCl.
    • Material texture and processing conditions are key factors influencing misorientation development.
    • Further research may be needed to fully elucidate the role of grain size and anisotropy.