Phase and structural transformations in directionally solidified with plant front intermetallic eutectic Ni-based alloys

Petrushin N.V., Elyutin E.S., Chabina E.B.
UDC
669.017.165:669.018.44
DOI
10.18577/2307-6046-2020-0-3-13-29
Article PDF (Russian) (1.09 MB)
How to cite
Petrushin N.V., Elyutin E.S., Chabina E.B. Phase and structural transformations in directionally solidified with plant front intermetallic eutectic Ni-based alloys // Proceedings of VIAM. 2020. No. 3. DOI: 10.18577/2307-6046-2020-0-3-13-29. URL: https://test.viam.ru/en/journal/2020/3/2
Keywords
eutectic intermetallic Ni-base alloys, directional solidification with a plan front, eutectic composites, segregation of alloying elements, solidus temperature, liquidus temperature, mechanical properties, long-term
Abstract

Ingots of samples of eutectic intermetallic nickel-base alloys γʹ+β, β+δ(Re), γʹ+NbC and γ/γʹ+NbC with natural composite structure respectively of the systems Ni–Al–W, Ni–Al–Re, Ni–Al–Nb–C and Ni–Al–Cr–Co–W–Mo–Nb–C are produced by the method of directional solidification with a plan front. Investigation are produced characteristics of the eutectic composites microstructure and phase composition, segregation of alloying elements along the composite zone of ingot, solidus temperature, liquidus temperature, volume fraction fibers δ(Re) and NbC in eutectic composites. For samples eutectic composite system Ni–Al–Cr–Cr–W–Mo–Nb–C with heterophase matrix base γʹ phase reinforced fibers of NbC-carbide tensile tests were performed in the temperature interval 20–1200 °С and long-term strength in the temperature interval 900–1200 °С at bases up to 1000 h.

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