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Pearlite in hypoeutectoid iron–nitrogen binary alloys

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Abstract

In this study, hypoeutectoid Fe–N binary specimens have been prepared by gas nitriding pure iron in austenite domain at 840 °C. The slow cooling of these specimens led to the α-ferrite + γ′-Fe4N pearlitic microstructure which is similar to the pearlite in Fe–C binary system. This pearlitic microstructure has been characterized by electron microscopy. The crystal structure of the γ′-Fe4N nitride has been identified by electron microdiffraction and the Nishiyama–Wassermann (N–W) and near Kurdjumov–Sachs (K–S) orientation relationships have been found between the α-ferrite and the γ′-Fe4N.

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Acknowledgements

This work is financially supported by ArcelorMittal SA. One of the authors (A. R.) is grateful to Dr A. Handaj for helpful discussions.

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Authors and Affiliations

  1. Laboratoire de Science et Génie des Surfaces, Nancy-Université, CNRS, Parc de Saurupt CS 14234, 54042, Nancy, France

    X. C. Xiong, A. Redjaïmia & M. Gouné

  2. ArcelorMittal SA, Voie Romaine, BP 30320, 57283, Maizieres-les-Metz, France

    M. Gouné

Authors
  1. X. C. Xiong
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  2. A. Redjaïmia
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  3. M. Gouné
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Correspondence to A. Redjaïmia.

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Xiong, X.C., Redjaïmia, A. & Gouné, M. Pearlite in hypoeutectoid iron–nitrogen binary alloys. J Mater Sci 44, 632–638 (2009). https://doi.org/10.1007/s10853-008-3054-7

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  • DOI: https://doi.org/10.1007/s10853-008-3054-7

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