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Grain detection from 2d and 3d EBSD data--specification of the MTEX algorithm.

Florian Bachmann¹, Ralf Hielscher, Helmut Schaeben

¹Geoscience Mathematics and Informatics, TU Bergakademie Freiberg, Germany.

Ultramicroscopy

|November 19, 2011

Summary

This summary is machine-generated.

We developed a fast algorithm to reconstruct grain structures from Electron Back Scatter Diffraction (EBSD) data using Voronoi decomposition. This method accurately maps grain boundaries and is invariant to specimen movement, enhancing material analysis.

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Area of Science:

Materials Science
Crystallography
Computational Methods

Background:

Electron Back Scatter Diffraction (EBSD) is crucial for analyzing material microstructures.
Accurate reconstruction of grain structures from EBSD data is essential for understanding material properties.
Existing methods may face limitations with complex geometries or missing data.

Purpose of the Study:

To present a fast and versatile algorithm for reconstructing grain structures from 2D and 3D EBSD data.
To provide a robust method applicable to various measurement configurations and tolerant to data loss.
To introduce a new approach for quantitative texture analysis using the MTEX software.

Main Methods:

The algorithm is based on the Voronoi decomposition of the measurement domain.
Grain boundaries are modeled as bisectors of adjacent measurement locations.
The method handles arbitrary geometrical configurations and missing data.

Main Results:

The algorithm accurately reconstructs grain structures from EBSD data.
It demonstrates invariance to spatial displacements (rotations, shifts) of the specimen.
The approach is integrated into the MTEX MATLAB toolbox for texture analysis.

Conclusions:

The proposed Voronoi-based algorithm offers a fast, versatile, and robust solution for EBSD-based grain structure reconstruction.
This method enhances the quantitative analysis of microstructures and texture.
The integration with MTEX provides a comprehensive tool for materials scientists.