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Identification of Inverse Bainite in Fe-0.84C-1Cr-1Mn Hypereutectoid Low Alloy Steel

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Abstract

A unique dilatation trend is observed for isothermal bainite transformation in Fe-0.84 pct C-1 pct Cr-1 pct Mn steel. The dilatation is found to occur in two stages with volumetric contraction dominating the first stage, followed by volumetric expansion dominating the second stage. Through electron microscopic characterization, bainitic microstructure is identified as inverse bainite with cementite (Fe3C) nucleating first from supersaturated austenite followed by the transformation of ferrite and secondary carbides (Fe3C, Fe2C, and Fe5C2) from carbon-depleted austenite.

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The authors acknowledge the support by NSERC through a CRD Grant, and thank Rebekah Bannister for helping in the dilatometer experiments.

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Authors and Affiliations

  1. Department of Chemical and Materials Engineering, University of Alberta, Edmonton, AB, T6G 2V4, Canada

    Rangasayee Kannan, Yiyu Wang & Leijun Li

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  1. Rangasayee Kannan
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  2. Yiyu Wang
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  3. Leijun Li
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Correspondence to Leijun Li.

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Manuscript submitted October 3, 2016.

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Kannan, R., Wang, Y. & Li, L. Identification of Inverse Bainite in Fe-0.84C-1Cr-1Mn Hypereutectoid Low Alloy Steel. Metall Mater Trans A 48, 948–952 (2017). https://doi.org/10.1007/s11661-016-3924-6

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