Specific features of rhenium-alloyed single-crystal nickel superalloys

Experimental data are presented on the effect of introduction of up to 12 wt % Re on the structure and properties of ZhS-type complexly alloyed casting nickel superalloys intended for the blades of modern aviation gas-turbine engines. Rhenium alloying is found to increase the temperature of onset of...

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Bibliographic Details
Published in:Russian metallurgy Metally 2006-10, Vol.2006 (5), p.406-414
Main Authors: Kablov, E. N., Petrushin, N. V., Bronfin, M. B., Alekseev, A. A.
Format: Article
Language:English
Subjects:
Alloying
Alloys
Gas turbine engines
Hardening
Metallurgy
Nickel base alloys
Rhenium
Solid solutions
Superalloys
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Summary:Experimental data are presented on the effect of introduction of up to 12 wt % Re on the structure and properties of ZhS-type complexly alloyed casting nickel superalloys intended for the blades of modern aviation gas-turbine engines. Rhenium alloying is found to increase the temperature of onset of melting of the alloys and the temperature of complete dissolution of a hardening γ'-Ni^sub 3^Al-based phase in a nickel-based γ solid solution. Moreover, rhenium hinders diffusion processes. Rhenium is shown to harden a nickel-based solid solution more effectively than Hf, Ta, Nb, W, or Mo. As compared to the other refractory metals, rhenium more effectively increases the long-term strength of the ZhS-type alloys at 1000°C. In addition, it increases their operating temperature to 1150°C.[PUBLICATION ABSTRACT]
ISSN:0036-0295
1555-6255
1531-8648
DOI:10.1134/S0036029506050089