Abstract
Martensite is a microconstituent that is indispensable for the strengthening of steels. In recent years, welding residual stresses reduction due to introducing volume expansion of martensitic low temperature transformation (LTT), has received more attention. In the present study, we quantificationally discussed the relationship between the lattice-strain deformation and the martensitic transformation of LTT, by in situ observation technique, using synchrotron X-rays. Martensitic transformation of 14Cr5Ni was observed by hybrid in situ observation technique. Accommodation mechanism of the transformation strain in martensitic transformation process was quantificationally discussed by the diffraction analysis of austenite phase.
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References
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Acknowledgments
This study was carried out as a part of research activities of Grants-in-Aid for Scientific Research A (No. 23246127) and “Fundamental Studies on Technologies for Steel Materials with Enhanced Strength and Functions” by Consortium of JRCM (The Japan Research and Development Center of Metals). Financial support from NEDO (New Energy and Industrial Technology Development Organization) is gratefully acknowledged. The synchrotron radiation experiments were performed at the BL46XU in the Spring-8 with the approval of the Japan Synchrotron Radiation Research Institute (JASRI) (Proposal No. 2009B2086). The authors are grateful to Dr. T. Shobu for the advice of data analysis.
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Zhang, S., Komizo, Yi. (2014). In situ Observation of Lattice-Strain and Solid State Transformation in Low Temperature Transformation Weld Metal by Synchrotron X-rays. In: Kannengiesser, T., Babu, S., Komizo, Yi., Ramirez, A. (eds) In-situ Studies with Photons, Neutrons and Electrons Scattering II. Springer, Cham. https://doi.org/10.1007/978-3-319-06145-0_5
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DOI: https://doi.org/10.1007/978-3-319-06145-0_5
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