The research of local phosphorus and sulfur distribution in γ and γ'-phases of ZhS36-VI superalloy single-crystals

Min P.G., Sidorov V.V., Kablov D.E., Vadeev V.E., Zaysev D.V.
UDC
669.018.44:621.745.55
DOI
10.18577/2307-6046-2017-0-7-3-3
Article PDF (Russian) (1.37 MB)
How to cite
Min P.G., Sidorov V.V., Kablov D.E., Vadeev V.E., Zaysev D.V. The research of local phosphorus and sulfur distribution in γ and γ'-phases of ZhS36-VI superalloy single-crystals // Proceedings of VIAM. 2017. No. 7. DOI: 10.18577/2307-6046-2017-0-7-3-3. URL: https://test.viam.ru/en/journal/2017/7/3
Keywords
phosphorus, sulfur, superalloy, single-crystal, impurities, neutralization, coherence, structure, lanthanum, long-term strength.
Abstract

The distribution of phosphorus and sulfur impurities in γ and γ'-phases of single-crystals was investigated by high-resolution transmission electron microscopy and micro X-ray spectral analysis. It is proved that impurities concentrates principally in γ-solid solution, and there are local areas of increased content in there. The nature of this distribution remains after high temperature long-term strength tests at that heterogeneity of sulfur content between (γ/γ')-phases becomes more pronounced, especially for alloy with high sulfur content. A mechanism for destruction of coherent coupling between γ- and γ'-phases at high impurities content and reducing of single-crystals high temperature strength was suggested.

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