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Effect of the early stages of decomposition on the strength and brittleness of martensitic stainless steel

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

Conclusions

  1. 1.

    The largest increase in strength and the associated embrittlement of steel 05Kh13N4M occur after prolonged aging at 350–450°.

  2. 2.

    The basic process of structural transformations determining the change in the physicomechanical properties is carbide formation in the martensitic matrix. Precipitation of cubic carbide M23C6 in the process of prolonged aging is a multistage process that includes the formation of segregates, two-dimensional Guinier-Preston-Bagaryatskii zones, various intermediate and coherent conditions of the forming carbide, and finally equilibrium carbide M23C6 having a surface of separation with the matrix.

  3. 3.

    The increase in the strength and the embrittlement of the steel during aging occur long before the appearance of M23C6 precipitates, i.e., the change in the mechanical properties depends on the structural transformations in the early stages of formation of M23C6.

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Literature cited

  1. V. G. Azbukin et al., "Resistance of chromium and chromium-nickel steels of the martensitic type of corrosion cracking," in: Metal Science [in Russian], No. 1 (16), Sudostroenie, Leningrad (1972).

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  2. Yu. F. Balandin et al., "Effect of heat treatment on the physicomechanical properties and corrosion resistance of austenitic-martensitic steel 0Kh13N5M2," in: Metal Science [in Russian], No. 3 (17), Sudostroenie, Leningrad (1972).

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Authors
  1. A. M. Parshin
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  2. N. E. Vasil'kov
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Additional information

Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 1, pp. 37–40, January, 1979.

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Parshin, A.M., Vasil'kov, N.E. Effect of the early stages of decomposition on the strength and brittleness of martensitic stainless steel. Met Sci Heat Treat 21, 44–48 (1979). https://doi.org/10.1007/BF00800397

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  • DOI: https://doi.org/10.1007/BF00800397

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