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New Protocol for Orientation Reconstruction from Martensite to Austenite in Steels

43 Pages Posted: 20 Jun 2019 Publication Status: Accepted

See all articles by Cheng-Yao Huang

Cheng-Yao Huang

National Taiwan University - Department of Materials Science and Engineering

Hsu-Chih Ni

National Taiwan University - Department of Materials Science and Engineering

Hung-Wei Yen

National Taiwan University - Department of Materials Science and Engineering; Advanced Research Center of Green Materials Science and Technology

Abstract

This work presents an approach for reconstructing the orientation of prior austenite using the martensite crystallography from an electron backscatter diffraction dataset. To optimize the accuracy and speed of reconstruction, the algorithm comprises three steps: orientation relationship refinement, orientation coalescence and regional voting. Martensitic stainless steel with/without retained austenite was used to demonstrate this approach. The reconstruction parameters can be determined theoretically or semi-theoretically in this algorithm. Moreover, mis-indexing near twinning boundaries of prior austenite is minimized in the regional voting process. Although some issues remain unsolved, this approach provides a balance between accuracy and efficiency in austenite reconstruction.

Keywords: prior austenite, reconstruction, martensitic phase transformation, steels, electron backscattering diffraction, orientation relationship

Suggested Citation

Huang, Cheng-Yao and Ni, Hsu-Chih and Yen, Hung-Wei, New Protocol for Orientation Reconstruction from Martensite to Austenite in Steels (June 19, 2019). Available at SSRN: https://ssrn.com/abstract=3406399 or http://dx.doi.org/10.2139/ssrn.3406399

Cheng-Yao Huang (Contact Author)

National Taiwan University - Department of Materials Science and Engineering ( email )

Taiwan

Hsu-Chih Ni

National Taiwan University - Department of Materials Science and Engineering

Taiwan

Hung-Wei Yen

National Taiwan University - Department of Materials Science and Engineering

Taiwan

Advanced Research Center of Green Materials Science and Technology

Taiwan

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