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Features of the micromechanism of failure of cast steels in the process of fatigue crack propagation

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  1. 1.

    The structure of quenching sorbite has greater resistance to fatigue crack propagation in the cast steels type 20GL and 20GFL than the ferrite-pearlite mixture after normalization.

  2. 2.

    The existence of macropores and micropores in cast metal does not affect the speed of fatigue crack propagation.

  3. 3.

    Spalling with a large number of secondary microcracks is a more energy consuming process than failure involving the formation of fatigue grooves.

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Literature cited

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    S. S. Gorelik, L. N. Rastorguev, and Yu. A. Skakov, Radiographic and Electron Optical Analysis [in Russian], Metallurgiya, Moscow (1970).

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    N. I. Kornev and L. N. Kosarev, "Estimate of the indispensable number of measurements in fractographic investigation of fatigue fractures," in: Collection of the All-Union Research Institute of Railroad Engineering: Fatigue Crack Resistance of Metallic Materials and Structural Elements of Means of Transport and Transport Equipment [in Russian], Transport, Moscow (1984), pp. 54–61.

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    M. N. Georgiev, N. Ya. Mezhova, L. P. Strok, and N. K. Shaurova, "The application of x ray fractography in the study of the regularities of the failure of metals," Zavod. Lab.,47, No. 8, 54–58 (1981).

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Additional information

All-Union Research Institute of Railroad Engineering. Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 3, pp. 24–27, March, 1986.

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Kornev, N.I., Kosarev, L.N. & Strok, L.P. Features of the micromechanism of failure of cast steels in the process of fatigue crack propagation. Met Sci Heat Treat 28, 189–194 (1986). https://doi.org/10.1007/BF00705389

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  • Fatigue
  • Fatigue Crack
  • Sorbite
  • Fatigue Crack Propagation
  • Great Resistance