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Special features of fracture of nickel alloys with a diffusion aluminide coat in tensile and low-cycle fatigue tests

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Abstract

Results of comparative tests for tensile strength and low-cycle fatigue of specimens of high-temperature nickel alloys ÉI929 and TsNK-7 without a coat and with a diffusion aluminide coat (Al−Si−REM) are presented. Fracture surfaces of the specimens are studied by the electron-microscopic method. It is shown that at a test temperature of 900°C the coat is plastic and is preserved without signs of damage on the whole of the surface of the specimen virtually without affecting the short-term strength and the fatigue resistance of the alloys.

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Authors and Affiliations

  1. Institute for Mechanical Engineering, Ekaterinburg, Russia

    N. B. Pugacheva & S. V. Kositsyn

  2. Institute of Metal Physics of the Ural Branch of the Russian Academy of Sciences, Ekaterinburg, Russia

    N. B. Pugacheva & S. V. Kositsyn

Authors
  1. N. B. Pugacheva
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  2. S. V. Kositsyn
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Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 3, pp. 25–28, March, 1999.

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Pugacheva, N.B., Kositsyn, S.V. Special features of fracture of nickel alloys with a diffusion aluminide coat in tensile and low-cycle fatigue tests. Met Sci Heat Treat 41, 117–120 (1999). https://doi.org/10.1007/BF02467696

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