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Related Experiment Videos

Crystallographic orientation assessment by electron backscattered diffraction.

F Cléton1, P H Jouneau, S Henry

  • 1CIME, Ecole Polytechnique Fédérale de Lausanne, Switzerland.

Scanning
|September 14, 1999
PubMed
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Electron Backscatter Diffraction (EBSD) accurately maps crystallographic orientation in materials. This technique, using specialized software, visualizes misorientations in nickel-based superalloys created by epitaxial laser metal forming.

Area of Science:

  • Materials Science
  • Crystallography
  • Manufacturing Engineering

Background:

  • Electron Backscatter Diffraction (EBSD) is a powerful microscopy technique for analyzing crystallographic orientation.
  • Accurate crystallographic data is crucial for understanding material properties and performance.
  • Laser cladding, specifically epitaxial laser metal forming (E-LMF), offers near net-shape manufacturing with controlled microstructures.

Purpose of the Study:

  • To illustrate the capability of EBSD in determining and emphasizing crystallographic orientation with high accuracy.
  • To demonstrate the use of specialized software for calculating Euler angles and visualizing misorientations.
  • To apply EBSD analysis to a specific case of nickel-based superalloy produced by epitaxial laser metal forming.

Main Methods:

Related Experiment Videos

  • Utilizing Electron Backscatter Diffraction (EBSD) for crystallographic orientation analysis.
  • Employing custom-developed software to compute Euler angles from scanned specimen data.
  • Generating crystallographic orientation maps and pole figures for graphical representation of misorientations.

Main Results:

  • Achieved an angular orientation accuracy of at least 1 degree.
  • Successfully computed Euler angles and visualized misorientations with flexibility.
  • Demonstrated the effectiveness of EBSD in characterizing the microstructure of laser-clad nickel-based superalloys.

Conclusions:

  • EBSD is a highly accurate method for mapping crystallographic orientation and revealing misorientations.
  • Specialized software enhances the analysis and graphical representation of EBSD data.
  • EBSD is well-suited for characterizing microstructures in advanced manufacturing processes like epitaxial laser metal forming.