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Related Experiment Videos

Determination of pattern centre in EBSD using the moving-screen technique.

D A Carpenter1, J L Pugh, G D Richardson

  • 1Technology Development Organization, Y-12 National Security Complex, Oak Ridge, TN 37831-8084, USA. carpenterda@y12.doe.gov

Journal of Microscopy
|September 1, 2007
PubMed
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A new high-precision calibration technique for electron backscatter diffraction (EBSD) was developed. This method requires no prior crystallographic knowledge or initial parameter estimates, simplifying the calibration process.

Area of Science:

  • Materials Science
  • Crystallography
  • Electron Microscopy

Background:

  • Electron Backscatter Diffraction (EBSD) is a crucial technique for analyzing material microstructures.
  • Accurate calibration of EBSD systems is essential for reliable crystallographic analysis.
  • Existing calibration methods often require prior crystallographic knowledge and initial parameter estimations.

Purpose of the Study:

  • To reformulate the 'moving-screen' or 'pattern magnification' method for EBSD calibration.
  • To develop a high-precision EBSD calibration technique.
  • To eliminate the need for specimen crystallographic knowledge and initial calibration parameter estimates.

Main Methods:

  • The study reformulated the 'moving-screen'/'pattern magnification' calibration method.

Related Experiment Videos

  • The technique relies on the precise displacement of the screen and camera assembly.
  • Corresponding points were interactively selected from EBSD patterns.

    • Main Results:

    • A high-precision EBSD calibration technique was developed.
    • The new method does not require prior crystallographic information about the specimen.
    • The technique eliminates the need for initial estimates of calibration parameters.

    Conclusions:

    • The reformulated EBSD calibration method offers high precision without requiring crystallographic knowledge.
    • Accurate displacement of the screen and camera assembly is key to the technique's success.
    • Automated routines could be achieved by selecting points from Hough transform analysis.