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Investigation of the Nitride Phase in a Heat-Resistant VZh171 Alloy of the Ni–Co–Cr–W–Ti System, Hardened by Internal Nitriding

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Inorganic Materials: Applied Research Aims and scope

Abstract

By means of the X-ray microspectral analysis and scanning and transmission electron microscopy, we investigate the composition of hardening phase particles—nitrides—after internal nitriding and subsequent heat treatment in the Ni–Co–Cr–W–Ti system of grade VZh171. The particles differ significantly in chemical composition: the main forming element—titanium or chromium—is proportionally replaced by the other alloy components. The nitride compositions at the surface and in the center of the sample differ in the element ratio. After annealing in vacuum, the content of chromium, tungsten, and cobalt in nitrides decreases, also less becomes the difference in the precipitate composition in the surface and the central layers of the sample; this phenomenon can be used to improve the alloy properties.

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Funding

This study is supported by the Russian Foundation for Basic Research, project no. 18-02-00760 in the study of the kinetics of particle growth in a nitrided alloy during isothermal annealing, and within the State Assignment, reg. no. AAAA-A19-119100800130-0, in the study of the heat-resistant alloy microstructure.

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Authors and Affiliations

  1. All-Russian Scientific Research Institute of Aviation Materials of the National Research Center Kurchatov Institute (VIAM), 105005, Moscow, Russia

    S. V. Ovsepyan, M. V. Akhmedzyanov & E. V. Filonova

  2. Institute of Problems of Chemical Physics, Russian Academy of Sciences, 142432, Chernogolovka, Moscow oblast, Russia

    Yu. R. Kolobov & S. S. Manokhin

Authors
  1. S. V. Ovsepyan
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  2. Yu. R. Kolobov
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  3. M. V. Akhmedzyanov
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  4. S. S. Manokhin
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  5. E. V. Filonova
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Corresponding authors

Correspondence to S. V. Ovsepyan, Yu. R. Kolobov, M. V. Akhmedzyanov, S. S. Manokhin or E. V. Filonova.

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Translated by I. Dikhter

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Ovsepyan, S.V., Kolobov, Y.R., Akhmedzyanov, M.V. et al. Investigation of the Nitride Phase in a Heat-Resistant VZh171 Alloy of the Ni–Co–Cr–W–Ti System, Hardened by Internal Nitriding. Inorg. Mater. Appl. Res. 13, 828–834 (2022). https://doi.org/10.1134/S2075113322030297

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