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Determination of Internal Stresses During Pearlite Transformation of 0.8c–1.5Mn Steel Through In-Situ Neutron Diffraction

14 Pages Posted: 12 Oct 2020 Publication Status: Under Review

See all articles by Satoshi Morooka

Satoshi Morooka

Japan Atomic Energy Agency - Materials Sciences Research Center

Nobuo Nakada

Tokyo Institute of Technology - Department of Materials Science and Engineering

Yuhki Tsukada

Nagoya University Graduate School of Engineering - Department of Materials Design Innovation Engineering

Wu Gong

Kyoto University - Center for Elements Strategy Initiative for Structural Materials (ESISM)

Takuro Kawasaki

Japan Atomic Energy Agency - J-PARC Center

Stefanus Harjo

Japan Atomic Energy Agency - J-PARC Center; National Institute for Materials Science - Elements Strategy Initiative for Structural Materials (ESISM)

Abstract

In this study, in-situ neutron diffraction during pearlite transformation and isothermal holding at 873 K after cooling of a 0.8C–1.5Mn steel specimen from 1323 K were conducted to measure the transformation stresses related to a eutectoid transformation. The stress relaxation behavior in cementite was also monitored to elucidate the relaxation of transformation elastic strains during isothermal annealing after pearlite transformation. By referring to the stress-free lattice parameter of an extracted electrolytic single-phase cementite sample after the long-time isothermal holding at 873 K, the transformation stresses were successfully evaluated. As one of the main findings, the elastic volume strain in cementite was determined to be approximately − 0.362%.

Keywords: Pearlite transformation, Eutectoid steel, Neutron diffraction, Stress relaxation, Elastic volume strain

Suggested Citation

Morooka, Satoshi and Nakada, Nobuo and Tsukada, Yuhki and Gong, Wu and Kawasaki, Takuro and Harjo, Stefanus, Determination of Internal Stresses During Pearlite Transformation of 0.8c–1.5Mn Steel Through In-Situ Neutron Diffraction. Available at SSRN: https://ssrn.com/abstract=3708734 or http://dx.doi.org/10.2139/ssrn.3708734

Satoshi Morooka (Contact Author)

Japan Atomic Energy Agency - Materials Sciences Research Center ( email )

Tokai, Ibaraki
Japan

Nobuo Nakada

Tokyo Institute of Technology - Department of Materials Science and Engineering ( email )

Tokyo, 226-8503
Japan

Yuhki Tsukada

Nagoya University Graduate School of Engineering - Department of Materials Design Innovation Engineering

Wu Gong

Kyoto University - Center for Elements Strategy Initiative for Structural Materials (ESISM) ( email )

Kyoto
Japan

Takuro Kawasaki

Japan Atomic Energy Agency - J-PARC Center

Japan

Stefanus Harjo

Japan Atomic Energy Agency - J-PARC Center ( email )

Japan

National Institute for Materials Science - Elements Strategy Initiative for Structural Materials (ESISM) ( email )

Japan

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