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Related Experiment Videos

3D electron backscatter diffraction characterization of fine α titanium microstructures: collection, reconstruction,

Ryan DeMott1, Nima Haghdadi1, Charlie Kong2

  • 1School of Materials Science & Engineering, UNSW Sydney, Sydney, NSW 2052, Australia.

Ultramicroscopy
|October 6, 2021
PubMed
Summary

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Three-dimensional electron backscatter diffraction (3D-EBSD) combined with advanced algorithms enables detailed characterization of complex titanium alloy microstructures, overcoming limitations of other 3D techniques.

Area of Science:

  • Materials Science
  • Crystallography
  • Additive Manufacturing

Background:

  • 3D electron backscatter diffraction (3D-EBSD) offers advanced 3D crystallographic data acquisition through serial sectioning.
  • Recent advancements in focused ion beam (FIB) sectioning and EBSD detectors enhance the volume-to-resolution ratio for 3D characterization.
  • Characterizing fine microstructures in Ti-6Al-4V produced by additive manufacturing presents significant challenges due to complex, interwoven features.

Purpose of the Study:

  • To elaborate on methods and analysis for characterizing fine titanium microstructures using 3D-EBSD.
  • To present novel, unpublished algorithms for 3D microstructure reconstruction and analysis.
  • To address the need for advanced tools in 3D materials characterization, particularly for complex additive manufactured alloys.
Keywords:
3D characterizationElectron backscatter diffractionGrain boundariesPlasma focused ion beamSerial sectioningTitanium alloys

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Main Methods:

  • Utilized a Xe+ plasma focused ion beam for serial sectioning.
  • Employed a complementary metal-oxide semiconductor based EBSD detector for crystallographic data collection.
  • Developed and applied new algorithms for 3D microstructure analysis, including variant identification and quantification.

Main Results:

  • Established best-practice 3D-EBSD collection protocols for challenging microstructures.
  • Developed advanced, unpublished algorithms for 3D data reconstruction and analysis.
  • Successfully characterized complex Ti-6Al-4V microstructures with features as small as 1 μm.

Conclusions:

  • The developed methods and algorithms provide crucial tools for analyzing fine microstructures in 3D.
  • These techniques offer significant improvements for characterizing complex materials, especially those produced via additive manufacturing.
  • The findings contribute valuable, unpublished insights to the 3D materials characterization community.