Automated Reconstruction of Spherical Kikuchi Maps
Chaoyi Zhu1, Kevin Kaufmann2, Kenneth Vecchio1
1Materials Science and Engineering Program, University of CA San Diego,La Jolla, CA 92093,USA.
Summary
This study introduces an automated method to reconstruct spherical Kikuchi maps from electron backscatter diffraction patterns. This technique enables accurate crystallographic orientation mapping and phase identification.
Area of Science:
- Materials Science
- Crystallography
- Computational Methods
Background:
- Electron Backscatter Diffraction (EBSD) is crucial for materials characterization.
- Reconstructing spherical Kikuchi maps aids in detailed crystallographic analysis.
- Current methods often lack full automation and can be labor-intensive.
Purpose of the Study:
- To develop an automated approach for reconstructing spherical Kikuchi maps.
- To demonstrate the feasibility of warping experimental Kikuchi patterns onto a simulated sphere.
- To enable accurate crystallographic analysis from EBSD data.
Main Methods:
- Automated pattern selection using multiple thresholds.
- Extraction of scan parameters and phase information.
- Generation of a simulated Kikuchi sphere as a reference.
- Overlaying experimental patterns onto the simulated sphere after calibration.
Main Results:
- Successful reconstruction of spherical Kikuchi maps from experimental data.
- Demonstration of warping arbitrary Kikuchi patterns to their correct sphere positions.
- Validation of the automated approach for known phases.
Conclusions:
- The proposed automated method is the first of its kind for spherical Kikuchi map reconstruction.
- This approach has the potential to improve orientation calculation accuracy.
- Future applications include enhanced pattern matching and phase identification.
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