Solubility of rhenium and ruthenium in the γʹ-phase and physicochemical properties of nickel alloys of the Ni–Al‒Re‒Ru system

Elyutin E.S., Petrushin N.V., Karachevtsev F.N., Chabina E.B.
UDC
539.2
DOI
10.18577/2307-6046-2023-0-6-3-14
Article PDF (Russian) (935.74 KB)
How to cite
Elyutin E.S., Petrushin N.V., Karachevtsev F.N., Chabina E.B. Solubility of rhenium and ruthenium in the γʹ-phase and physicochemical properties of nickel alloys of the Ni–Al‒Re‒Ru system // Proceedings of VIAM. 2023. No. 6. DOI: 10.18577/2307-6046-2023-0-6-3-14. URL: https://test.viam.ru/en/journal/2023/6/1
Keywords
Ni–Al–Re–Ru system, directional solidification, flat growth front, segregation of alloying element, temperature solidus, temperature liquidus
Abstract

Directional solidification with a flat front of a nickel alloy of the Ni‒Al‒Re‒Ru system was performed. As a result, a casting with a variable length content of the elements Al, Re and Ru (gradient casting) was obtained. It is established that during solidification in a gradient casting, nickel alloys with the structures γ + γʹ, γʹ, γʹ + β are successively formed. The solubility’s of Re and Ru in the γʹ and β phases of the γ + γʹ, γʹ, γʹ + β alloys were determined. For the same alloys, the temperatures γʹ-solvus, solidus and liquidus are determined. It was found that in the Ni–Al–Re–Ru nickel system, the γʹ phase is formed by a peritectic reaction L + γ → γ' at 1374 °C and a eutectic reaction L → γʹ + β at 1372 °C.

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