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Experimental investigation of in-situ transformations of the M 7C3 carbide in the cast Fe–Cr–Ni alloy

  • Structure, Phase Transformations, and Diffusion
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Abstract

The microstructure and the phase composition of a heat-resistant Fe–Cr–Ni alloy (0. 45C–25Cr–35Ni) has been investigated in the cast state and after annealing at 1150°C for 2–100 h. After a 2-h high-temperature annealing, the fragmentation of the crystal structure of the eutectic M 7C3 carbides into domains of ~500 nm in size with a partial transition into M 23C6 carbides is observed. After a 100-h holding, the complete transition of the hexagonal M 7C3 carbides into M 23C6 with a face-centered cubic structure occurs. The carbide transition M 7C3 →M 23 can be considered to be an in situ transformation.

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Authors and Affiliations

  1. Bauman Moscow State Technical University, Vtoraya Baumanskaya ul. 5, Moscow, 105005, Russia

    V. S. Kraposhin

  2. Peter the Great St. Petersburg Polytechnic University, Politekhnicheskaya ul. 29, St. Petersburg, 195251, Russia

    S. Yu. Kondrat’ev & G. P. Anastasiadi

  3. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, ul. Vavilova 28, Moscow, 119991, Russia

    A. L. Talis

Authors
  1. V. S. Kraposhin
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  2. S. Yu. Kondrat’ev
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  3. A. L. Talis
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  4. G. P. Anastasiadi
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Correspondence to S. Yu. Kondrat’ev.

Additional information

Original Russian Text © V.S. Kraposhin, S.Yu. Kondrat’ev, A.L. Talis, G.P. Anastasiadi, 2017, published in Fizika Metallov i Metallovedenie, 2017, Vol. 118, No. 3, pp. 240–246.

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Kraposhin, V.S., Kondrat’ev, S.Y., Talis, A.L. et al. Experimental investigation of in-situ transformations of the M 7C3 carbide in the cast Fe–Cr–Ni alloy. Phys. Metals Metallogr. 118, 227–232 (2017). https://doi.org/10.1134/S0031918X17030085

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  • DOI: https://doi.org/10.1134/S0031918X17030085

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