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A thermodynamic assessment of the Fe-Cr-Ni-C system

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An Erratum to this article was published on 01 May 1992

Abstract

Since the Gibbs energy of formation of Cr23C{6}, Cr{7}C{3}, and Cr3C2 in the Cr-C system was modified in the recent assessment of the Cr-Ni-C system, it is not possible to continue with the previous description of the Fe-Cr-C system. In the present work, the Fe-Cr-Ni-C system was studied thermodynamically together with the Fe-Cr-C system, using the new descriptions of the Cr-Ni-C, Fe-Ni-C, and Fe-Cr-Ni systems. The descriptions of M23C6, M{7}C{3}, body-centered cubic (bcc) ferrite, cementite, and liquid in the Fe-Cr-C system were reassessed. Particularly, attention was paid to improve the description of the solubility of M23C6 in face-centered cubic (fcc) austenite. Composition-dependent interactions for M23C6 and M7C3 were introduced in order to get good agreement. After the new assessment, comparisons between experimental information and calculated results were made, which show that the agreement with experiments is satisfactory. Some phase diagrams are presented for practical use.

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Authors and Affiliations

  1. Division of Physical Metallurgy, Royal Institute of Technology, S-10044, Stockholm, Sweden

    Mats Hillert (Professor Emeritus) & Caian Qiu (Graduate Student)

Authors
  1. Mats Hillert
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  2. Caian Qiu
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Additional information

An erratum to this article is available at http://dx.doi.org/10.1007/BF02647341.

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Hillert, M., Qiu, C. A thermodynamic assessment of the Fe-Cr-Ni-C system. Metall Trans A 22, 2187–2198 (1991). https://doi.org/10.1007/BF02664985

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