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Carbon Enrichment in Austenite During Bainite Transformation in Fe-3Mn-C Alloy

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Abstract

Carbon enrichment in austenite after the cessation of bainite transformations in an Fe-3Mn-0.08C alloy was measured by FE-EPMA. The carbon content in austenite is lower than paraequilibrium composition, and undercoolings from paraequilibrium model vary from 400 to 1000 J/mol, while carbon contents are higher than those predicted by negligible partitioning local equilibrium model. On the other hand, it was found that undercoolings from T 0 composition are nearly the constant, 400 J/mol, at the temperatures investigated.

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Acknowledgments

Financial support provided by China Scholarship Council through Joint-Supervising PhD Program is gratefully acknowledged. A part of this research was supported by” Creation of Innovative Functions of Intelligent Materials on the Basis of Element Strategy” by CREST Basic Research Program. T.F. greatly acknowledged the financial support provided by the Ministry of Education, Culture, Sports, Science, and Technology through a Grant-in-Aid for Scientific Research (B) No. 23360316 (2011–2013). Z.-G. Y. and Z.-Q. L. greatly acknowledged the financial support provided by the National Natural Science Foundation of China (Grant No. 51471094 and No. 51171087).

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Authors and Affiliations

  1. School of Materials Science and Engineering, Key Laboratory of Advanced Materials of Ministry of Education, Tsinghua University, Beijing, 100084, P.R. China

    Zhen-Qing Liu (Ph.D. Student, Graduate Student), Zhi-Gang Yang (Professor) & Chi Zhang (Associate Professor)

  2. Institute for Materials Research, Tohoku University, Aoba-Ku, Sendai, 980-8577, Japan

    Goro Miyamoto (Associate Professor) & Tadashi Furuhara (Professor)

  3. Department of Metallurgy, Tohoku University, Aoba-Ku, Sendai, 980-8577, Japan

    Zhen-Qing Liu (Ph.D. Student, Graduate Student)

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  1. Zhen-Qing Liu
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  2. Goro Miyamoto
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  3. Zhi-Gang Yang
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  4. Chi Zhang
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  5. Tadashi Furuhara
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Correspondence to Zhen-Qing Liu.

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Manuscript submitted September 12, 2014.

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Liu, ZQ., Miyamoto, G., Yang, ZG. et al. Carbon Enrichment in Austenite During Bainite Transformation in Fe-3Mn-C Alloy. Metall Mater Trans A 46, 1544–1549 (2015). https://doi.org/10.1007/s11661-015-2744-4

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