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Predicting the Austenite Fraction After Intercritical Annealing in Lean Steels as a Function of the Initial Microstructure

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Abstract

The final fractions of austenite after the isothermal austenite-to-ferrite transformation and its reverse transformations (including the martensite-to-austenite and the pearlite + ferrite-to-austenite transformations) in the intercritical annealing region have been studied using full equilibrium (FE), paraequilibrium (PE), and local equilibrium (LE) calculations and experiments. The LE model predictions are in a very good agreement with the experimental results, while the FE and PE model predictions deviate significantly. It is also found that the LEP/LENP transition for the austenite-to-ferrite transformation deviates from those of its reverse transformations. The magnitude of deviation increases with the increasing Mn concentration.

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The authors acknowledge the financial support by Arcelor Mittal, France for this study.

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Authors and Affiliations

  1. Faculty of Aerospace Engineering, Delft University of Technology, Kluyverweg 1, 2629 HS, Delft, The Netherlands

    Hao Chen (Postdoctoral Researcher), Xiaojun Xu (PhD Candidate), Wei Xu (Assistant Professor) & Sybrand van der Zwaag (Professor)

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  1. Hao Chen
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  2. Xiaojun Xu
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  3. Wei Xu
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  4. Sybrand van der Zwaag
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Corresponding author

Correspondence to Hao Chen.

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Manuscript submitted October 24, 2013.

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Chen, H., Xu, X., Xu, W. et al. Predicting the Austenite Fraction After Intercritical Annealing in Lean Steels as a Function of the Initial Microstructure. Metall Mater Trans A 45, 1675–1679 (2014). https://doi.org/10.1007/s11661-014-2186-4

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  • DOI: https://doi.org/10.1007/s11661-014-2186-4

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