The investigation of the influence of ageing temperature on structural and phase transformations in VZh177

Shestakova A.A., Karachevtsev F.N., Zhebelev N.M.
UDC
669.018.44:699.245
DOI
10.18577/2307-6046-2018-0-5-3-11
Article PDF (Russian) (1.05 MB)
How to cite
Shestakova A.A., Karachevtsev F.N., Zhebelev N.M. The investigation of the influence of ageing temperature on structural and phase transformations in VZh177 // Proceedings of VIAM. 2018. No. 5. DOI: 10.18577/2307-6046-2018-0-5-3-11. URL: https://test.viam.ru/en/journal/2018/5/1
Keywords
nickel-base superalloy, microstructure, carbides, heat treatment, ageing.
Abstract

The investigation results of the formation of strengthen phases (secondary carbides and γ'-phase) in new Ni-base superalloy VZh177 developed for jet-engine disk application are presented in the article. The structural and phase composition of the material after solution treatment and the further evolution of the microstructure during ageing were esteemed. The main carbide formation elements in bulk primary carbides were determined via the method of energy-dispersion spectroscopy. The nucleation dynamic of the fine dispersion carbides at grain boundaries was investigated via he method of scanning electron microscopy. The investigation of the strengthen γ'-phase morphology in the temperature range from 850 to 1000°C was presented. The dispersion range of the maximum volume of γ'-phase was established. The changing of mean diameter and morphology of the phase depending to ageing regime was also shown. The authors of the article suggest to investigate microhardness after various ageing tim

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