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Structural Features of Cast Refractory Alloy HP40NbTi High-Temperature Oxidation. Part 2. Microstructure and Phase Composition Evolution

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Metal Science and Heat Treatment Aims and scope

Optical and electron microscopy and x-ray spectral microanalysis are used to study the transformation of the phases present in the structure of cast refractory alloy HP40NbTi during prolonged high-temperature oxidation. It is established that during oxidation alloy phase chemical composition changes continuously and by complex laws in relation to the surroundings, temperature, and exposure duration, and there is rapid exchange of chemical elements between different phases. After prolonged exposure this process reaches a limiting condition.

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Notes

  1. Here and subsequently through the text the element content is shown in weight fractions expressed as a %, with the exception of specially stipulated cases.

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Experimental research was conducted on equipment of the Center for Collective Usage of Scientific Equipment “Composition, structure, and properties of structural and functional materials” of the NITs Kurchatov Institute – TsNII KM Prometei with financial support Of the Russian Ministry of Education and Science within the scope of agreement No. 14.595.21.0004, unique identifier RFMEF159517X0004.

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Authors and Affiliations

  1. Peter the Great Polytechnic University, St. Petersburg, Russia

    S. Yu. Kondrat’ev, S. N. Petrov, G. P. Anastasiadi & A. V. Tsemenko

  2. I. V. Gorynin TsNII KM National Research Center, Kurchatov Institute, St. Petersburg, Russia

    S. N. Petrov & A. V. Tsemenko

Authors
  1. S. Yu. Kondrat’ev
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  2. S. N. Petrov
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  3. G. P. Anastasiadi
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  4. A. V. Tsemenko
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Correspondence to S. N. Petrov.

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Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 1, pp. 47 – 56, January, 2020.

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Kondrat’ev, S.Y., Petrov, S.N., Anastasiadi, G.P. et al. Structural Features of Cast Refractory Alloy HP40NbTi High-Temperature Oxidation. Part 2. Microstructure and Phase Composition Evolution. Met Sci Heat Treat 62, 46–54 (2020). https://doi.org/10.1007/s11041-020-00511-6

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