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Depth-resolved strain measurements in polycrystalline materials by energy-variable X-ray diffraction.

E Zolotoyabko1, B Pokroy, J P Quintana

  • 1Department of Materials Engineering, Technion-Israel Institute of Technology, Haifa 32000, Israel. zloto@tx.technion.ac.il

Journal of Synchrotron Radiation
|June 24, 2004
PubMed
Summary

This study introduces an energy-variable synchrotron diffraction method for measuring residual strains in materials. By adjusting X-ray energy, researchers can achieve precise depth-resolved strain analysis in polycrystalline structures.

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Area of Science:

  • Materials Science
  • Crystallography
  • Analytical Chemistry

Background:

  • Residual strains in polycrystalline materials impact their performance and longevity.
  • Accurate depth-resolved strain measurement is crucial for understanding material behavior.
  • Existing methods may lack the necessary depth resolution or versatility.

Purpose of the Study:

  • To establish a novel energy-variable synchrotron diffraction technique for depth-resolved residual strain measurement.
  • To develop an analytic expression for diffraction profiles considering experimental factors.
  • To demonstrate the method's capability for precise strain analysis.

Main Methods:

  • Utilizing an energy-variable synchrotron X-ray source.
  • Developing an analytic model for diffraction profiles accounting for instrument misalignment and X-ray penetration depth.

Related Experiment Videos

  • Varying X-ray energy to probe different depths within the sample.

    • Main Results:

    • The maximum diffraction intensity originates from an energy-dependent depth below the sample surface.
    • The developed analytic expression accurately models the diffraction profile.
    • Successful demonstration of depth-resolved residual strain measurement across an alumina/zirconia multilayer.

    Conclusions:

    • The energy-variable synchrotron diffraction technique offers high depth resolution for residual strain analysis.
    • This method enables precise, non-destructive strain mapping in polycrystalline materials.
    • The technique has significant potential for materials characterization and quality control.