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A study of fatigue resistance of preforms of alloy ÉP741NP faricated by hot isostatic pressing

  • Physical Metallurgy of Hot Isostatic Pressing
  • Published:
Metal Science and Heat Treatment Aims and scope

Conclusions

  1. 1.

    The changed surface layer formed on a compact of alloy ÉP741NP due to the interaction with the metal of the capsule (steel 20) in the process of hot isostatic pressing and subsequent heat treatment is enriched with iron and carbon and depleted of nickel and cobalt.

  2. 2.

    The changed surface layer 200–300 μm thick on specimens of alloy ÉP741NP diminishes the fatigue resistance of the alloy by 15% (650 MPa against the original 750 MPa) in testing at 20°C, but does not embrittle the material and does not initiate fatigue fracture or influence the fracture behavior.

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Authors
  1. Yu. A. Pestov
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  2. O. N. Zheleznyak
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  3. G. G. Derkach
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  4. V. N. Semenov
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Additional information

Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 10, pp. 29–31, October, 1999.

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Pestov, Y.A., Zheleznyak, O.N., Derkach, G.G. et al. A study of fatigue resistance of preforms of alloy ÉP741NP faricated by hot isostatic pressing. Met Sci Heat Treat 41, 451–453 (1999). https://doi.org/10.1007/BF02469097

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  • DOI: https://doi.org/10.1007/BF02469097

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