The effect of long-term high-temperature heat treatment at 950°C on the structure and mechanical properties of the ZhS6U superalloy / Tyagunov A.G., Baryshev E.E., Kostina T.K., Baum B.A., Lesnikov V.P., Semenova I.P. // Physics of Metals and Metallography. - 1998. - V. 86, l. 1. - P. 65-69.

ISSN:

0031918X

Type:

Article

Abstract:

The effects of isothermal heat treatment of the ZhS6U superalloy (at an operating temperature of 950°C after a standard vacuum heat treatment) on the stability of its structure and mechanical properties were investigated. It was established that long-term holding of this alloy at the operating temperature is accompanied by the formation of M6C carbides, coalescence of the secondary γ' phase, and precipitation of embrittling topologically close-packed (TCP) phases of the σ and χ types. The employment of a high-temperature heat treatment of the melt (HTTM) at the stage of ingot melting changes the morphology and volume contents of structure constituents of the alloy. The transformations in the course of long-term holding at the above temperature also occur somewhat differently. It was shown that the use of HTTM in manufacturing the alloy requires improvement of the regimes of its heat treatment.

Author keywords:

Index keywords:

Carbides; Embrittlement; Heat treatment; High temperature effects; Morphology; Phase composition; Stability; Close-packed phases; Superalloys

DOI:

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Link	https://www.scopus.com/inward/record.uri?eid=2-s2.0-0032116547&partnerID=40&md5=065ec846311bb886dca614c306eafbd4
Affiliations	Ural State Technical University, ul. Mira 19, Ekaterinburg, 620002, Russian Federation; Ufa Engine-Manufacture Prod. Assoc., ul. Sel'skaya Bogorodskaya 4, Ufa, 450039 Bashkortostan, Russian Federation
References	Tyagunov, A.G., Baryshev, E.E., Tsepelev, V.S., Kostina, T.K., Baum, B.A., Savin, O.V., Electrical resistivity of liquid superalloys (1996) Rasplavy, (6), pp. 23-28; Baum, B.A., Larionov, V.N., Kovalenko, L.V., Tyagunov, G.V., Kuleshova, E.A., Baryshev, E.E., Tret'yakova, E.E., Kolotukhin, E.V., Resource saving and improvement of service characteristics of nickel superalloy castings using high-temperature treatment of the melt (1993) Izv. Ross. Akad. Nauk, Met., (1), pp. 31-37; Paton, B.E., Stroganov, G.B., Kishkin, S.T., (1987) Zharoprochnost' Liteinykh Nikelevykh Splavov (High-temperature Strength of Casting Nickel Alloys), , Kiev: Naukova Dumka; Kishkin, S.T., Stroganov, G.B., Logunov, A.V., Carbide phases in nickel superalloys (1983) Izv. Akad. Nauk SSSR, Met., (5), pp. 143-149; Pirogova, G.D., Levin, E.E., Composition of the γ' phase upon long-term aging of some nickel superalloys (1971) Fiz. Met. Metalloved., 31 (2), pp. 373-378; Superalloys, T., Sims, T.C., Hagel, W.C., (1972), New York: Wiley; Shinyaev, A.Ya., Solov'ev, Yu.V., Thermal stability of nickel alloys (1984) Zharoprochnye i Zharostoikie Stali i Splavy na Nikelevoi Osnove (High-strength and Heat-resistant Nickel-base Steels and Alloys), pp. 198-205. , Moscow: Nauka; Pirogova, G.D., Levin, E.E., Carbide phases in nickel-base superalloys (1972) Fiz. Met. Metalloved., 33 (6), pp. 1297-1309; Pirogova, G.D., Levin, E.E., Conditions of the formation of σ and μ phases in nickel-base superalloys (1969) Fiz. Met. Metalloved., 28 (5), pp. 858-867
Correspondence Address	Tyagunov, A.G.; Ural State Technical University, ul. Mira 19, Ekaterinburg, 620002, Russian Federation
Language of Original Document	English
Abbreviated Source Title	Phys. Met. Metallogr.
Source	Scopus