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

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...

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Bibliographic Details
Published in:Inorganic materials : applied research 2022-06, Vol.13 (3), p.828-834
Main Authors: Ovsepyan, S. V., Kolobov, Yu. R., Akhmedzyanov, M. V., Manokhin, S. S., Filonova, E. V.
Format: Article
Language:English
Subjects:
Chemical composition
Chemistry
Chemistry and Materials Science
Chromium
Hardening
Heat resistant alloys
Heat treatment
Industrial Chemistry/Chemical Engineering
Inorganic Chemistry
Materials Science
New Methods of Treatment and Production of Materials with Required Properties
Nitrides
Nitriding
Titanium
Tungsten
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Summary: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.
ISSN:2075-1133
2075-115X
DOI:10.1134/S2075113322030297