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Effect of Testing Conditions on the Functional and Mechanical Properties of Granulated Nickel Alloy ÉP741NP

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Abstract

Results of testing alloy ÉP741NP in a hydrogen medium at a pressure of 13 and 45 MPa and a temperature of 20 – 830°C as applied to the conditions of service of elastic metallic seals of detachable joints of liquid-propellant engines are presented. The hydrogen permeability, the mechanical properties of the alloy with a tightening Ni – Ag coating, the bearing capacity under the conditions of a complexly stressed state, and the long-term strength are investigated. Tests of simulators of detachable joints with seals from alloy ÉP741NP are described. Structures from the studied alloy with a Ni – Ag coating are shown to operate successfully at a hydrogen pressure of up to 45 MPa and a temperature of up to 800°C.

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Authors and Affiliations

  1. V. P. Glushko Énergomash Research and Production Association, Khimki, Moscow Region, Russia

    B. M. Gromyko, O. N. Zheleznyak, M. V. Zaitsev, E. M. Matveev & V. A. Sorokin

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  1. B. M. Gromyko
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  2. O. N. Zheleznyak
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  3. M. V. Zaitsev
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  4. E. M. Matveev
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  5. V. A. Sorokin
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Gromyko, B.M., Zheleznyak, O.N., Zaitsev, M.V. et al. Effect of Testing Conditions on the Functional and Mechanical Properties of Granulated Nickel Alloy ÉP741NP. Metal Science and Heat Treatment 45, 213–218 (2003). https://doi.org/10.1023/A:1025907706096

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  • DOI: https://doi.org/10.1023/A:1025907706096

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