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Related Experiment Video

Updated: Feb 27, 2026

Expedited Radiation Biodosimetry by Automated Dicentric Chromosome Identification ADCI and Dose Estimation
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Improved simulation based HR-EBSD procedure using image gradient based DIC techniques.

Jon Alkorta1, Matthieu Marteleur2, Pascal J Jacques2

  • 1CEIT and TECNUN (University of Navarra), P° de Manuel Lardizabal 15, Donostia 20018, Spain.

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|June 24, 2017
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Summary
This summary is machine-generated.

This study introduces an improved algorithm for electron backscatter diffraction (EBSD) to accurately measure absolute crystal orientations and stresses. This new hybrid method enhances intergranular analysis and material characterization, particularly for alloys undergoing phase transformations.

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Area of Science:

  • Materials Science
  • Crystallography
  • Metallurgy

Background:

  • High-resolution electron backscatter diffraction (HR-EBSD) accurately measures relative crystal misorientations and microstresses.
  • Conventional HR-EBSD requires simulated patterns for absolute orientation and stress values, crucial for intergranular analyses.
  • Existing simulation-based methods struggle with poor pattern correlation, especially with Bragg simulations.

Purpose of the Study:

  • To develop an improved algorithm for simulation-based HR-EBSD.
  • To introduce a new pattern center calibration procedure.
  • To present a hybrid HR-EBSD method for absolute orientation and stress determination.

Main Methods:

  • An improved algorithm based on gradient-based correlation techniques was developed.
  • A novel pattern center calibration procedure was proposed and validated.
  • A hybrid procedure combining simulation-based and conventional HR-EBSD was implemented.

Main Results:

  • The improved algorithm enables simulation-based HR-EBSD with better pattern correlation.
  • The new calibration procedure enhances accuracy.
  • The hybrid HR-EBSD method achieves absolute determination of orientations and stresses with improved accuracy.

Conclusions:

  • The developed algorithm and hybrid method overcome limitations of previous simulation-based approaches.
  • The technique allows for accurate intergranular analysis and material characterization.
  • The hybrid HR-EBSD was successfully applied to analyze martensitic transformation in a Ti-12wt.%Mo alloy.