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Shatter cracks and the effect of heat treatment conditions on the elimination of hydrogen from steel

  • Structural Steels
  • Published:
Metal Science and Heat Treatment Aims and scope

Conclusions

  1. 1.

    Shatter cracks are nucleated and grow after a certain incubation period, the length of which becomes shorter with an increase in the hydrogen content of the sample, the residual stresses, the carbon content, and the grain size.

  2. 2.

    The assumption [1–3] that shatter cracks are formed instantaneously in the transformation of retained austenite into martensite due to “thermal explosion” resulting from the heat liberated in the formation of molecules from atomic hydrogen precipitated from the solution at a rate matching the formation rate of martensite needles is in error.

  3. 3.

    Shatter cracks can be prevented by a combination of cooling conditions and final heat treatment (normalization, improvement) ensuring refining of the microstructure and substructure and the maximum values of the static and dynamic toughness at a given strength.

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Authors
  1. I. E. Brainin
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Additional information

Donets Polytechnical Institute. Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 1, pp. 44–47, January, 1971.

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Brainin, I.E. Shatter cracks and the effect of heat treatment conditions on the elimination of hydrogen from steel. Met Sci Heat Treat 13, 46–48 (1971). https://doi.org/10.1007/BF00663778

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  • DOI: https://doi.org/10.1007/BF00663778

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