Visualization of grain subdivision by analysing the misorientations within a grain using electron backscatter...

Area of Science:

• Materials Science
• Crystallography
• Electron Microscopy

Background:

• Understanding grain misorientation is crucial for materials properties.
• Electron Backscatter Diffraction (EBSD) is a key technique for microstructural analysis.
• Deformation processes significantly influence grain orientation and structure.

Purpose of the Study:

• To analyze grain and point-to-point misorientation in deformed materials using EBSD data.
• To introduce and discuss a novel visualization technique for misorientation band structures.
• To compare grain boundary reconstruction methods and validate their accuracy using confidence index maps.

Main Methods:

• Detailed analysis of misorientation angle and axis from EBSD datasets.
• Development of a new color-mapping technique to visualize grain subdivision structures.
• Comparison of grain boundary reconstruction algorithms against EBSD confidence index maps.

Main Results:

• Visualization of misorientation relative to average grain orientation and along lines within deformed grains.
• Demonstration of the significance of misorientation axis monitoring in identifying band structures.
• Validation of grain boundary reconstruction accuracy through confidence index mapping.

Conclusions:

• The study provides enhanced methods for analyzing and visualizing grain misorientation and substructures.
• The new visualization technique effectively highlights misorientation band structures.
• The comparison of reconstruction methods offers a validation pathway for EBSD data processing.