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Relaxation resistance of heat-resistant alloys containing cobalt

  • Heat-Resistant Steels and Alloys
  • Published:
Metal Science and Heat Treatment Aims and scope

Conclusions

  1. 1.

    The addition of a substantial amount of cobalt (at least 10–12%) to a nickel alloy containing 10% Cr, 5–10% Mo, and 5% W, with a total concentration of Ti+Al≥5%, produces an alloy with extremely high relaxation resistance at temperatures up to 850°.

  2. 2.

    Alloy KhN62MVKYu, with 5% Co, has a much lower relaxation resistance. The relaxation resistance at 800–850° can be increased considerably by means of repeated loading (holding).

  3. 3.

    For the cobalt-containing alloys tested there is no correlation between the relaxation and creep characteristics (long-term strength) at high temperatures.

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Literature cited

  1. F. F. Khimushin, Heat-Resistant Steels and Alloys [in Russian], Metallurgiya, Moscow (1969).

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  2. L. N. Zimina, "Cobalt in heat-resistant nickel alloys," in: Special Steels and Alloys [in Russian], Metallurgiya, Moscow (1972), p. 83.

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  3. A. M. Borzdyka and L. V. Getsov, Stress Relaxation in Metals and Alloys [in Russian], Metallurgiya, Moscow (1972).

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  4. A. M. Borzdyka and G. A. Sveshnikova, "Increase in the relaxation resistance of heat-resistant alloys by the holding method," Metalloved. Term. Obrab. Met., No. 10, 153 (1972).

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  5. A. M. Borzdyka and L. P. Nikitina, "Comparisons of data obtained in relaxation tests in bending and tension," Zavod. Lab., No. 8, 984 (1972).

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Authors
  1. A. M. Borzdyka
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Additional information

I. P. Bardin Central Scientific-Research Institute of Ferrous Metallurgy. Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 11, pp. 16–20, November, 1977.

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Borzdyka, A.M. Relaxation resistance of heat-resistant alloys containing cobalt. Met Sci Heat Treat 19, 937–940 (1977). https://doi.org/10.1007/BF00670160

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  • DOI: https://doi.org/10.1007/BF00670160

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