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Quantitative analysis of compatible microstructure by electron backscatter diffraction.

Michael Chapman1,2, Marc De Graef1, Richard D James3

  • 1Materials Science and Engineering, Carnegie Mellon University, PA 15213, USA.

Philosophical Transactions. Series A, Mathematical, Physical, and Engineering Sciences
|May 24, 2021
PubMed
Summary
This summary is machine-generated.

We developed a method using electron backscatter diffraction to identify martensite variants in materials. This helps understand shape memory alloys with high reversibility and low hysteresis.

Keywords:
compatibilityelectron backscatter diffractionmartensitemicrostructure

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Area of Science:

  • Materials Science
  • Crystallography
  • Solid-state Physics

Background:

  • Martensitic materials undergo solid-solid phase transformations.
  • Understanding martensite variant arrangement is crucial for material properties.
  • Shape memory alloys require specific microstructures for optimal performance.

Purpose of the Study:

  • To propose a scheme for assigning martensite variants using electron backscatter diffraction.
  • To develop an algorithm for variant assignment in specific microscopic regions.
  • To assess the elastic compatibility of microstructures in shape memory alloys.

Main Methods:

  • Utilizing electron backscatter diffraction (EBSD) for crystallographic analysis.
  • Applying solutions to crystallographic equations of martensite.
  • Developing a computational algorithm for variant identification and compatibility checks.

Main Results:

  • A validated scheme for assigning martensite variants.
  • An algorithm enabling precise variant identification in microstructures.
  • Demonstration of elastic compatibility assessment for enhanced material properties.

Conclusions:

  • The proposed scheme and algorithm effectively assign martensite variants.
  • This method aids in designing shape memory alloys with low hysteresis and high reversibility.
  • The work contributes to the mathematical design of complex materials.