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Structural changes in biphase Cr−Mn steels under conditions of superplasticity

  • Stainless Steels
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Metal Science and Heat Treatment Aims and scope

Conclusions

  1. 1.

    The necessary condition for obtaining high plasticity of steels 0Kh12G14N4F3 and 0Kh12G14N4F2 is an original fine-grained α+γ structure.

  2. 2.

    In the process of superplastic flow the particles of α ferrite grow larger and more complex in shape. Raising the temperature of superplastic flow and lowering the pull rate induce grain growth.

  3. 3.

    The lowering of the stress (softening) in the process of plastic flow is a necessary condition for achieving high values of elongation for the steels investigated. Softening during superplastic flow is determined mainly by grain growth of the structural components.

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Literature Cited

  1. A. A. Bochvar and Z. A. Sviderskaya, "The unusual high plasticity of some Zn−Al alloys", Izv. Akad. Nauk SSSR, OTN, No. 7, 1001 (1946).

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  2. R. K. Gibson and H. J. Brody, "Fe−Cr−Ni alloys with a microduplex structure", in: Superfine Grains in Metals [Russian translation], Metallurgiya, Moscow (1973), p. 347.

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  3. S. A. Saltykov, Stereometric Metallography [in Russian], Metallurgiya, Moscow (1970).

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Authors
  1. O. A. Bannykh
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  2. T. N. Pedan
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Additional information

A. A. Baikov Institute of Metallurgy. Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 3, pp. 17–19, March, 1977.

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Bannykh, O.A., Pedan, T.N. Structural changes in biphase Cr−Mn steels under conditions of superplasticity. Met Sci Heat Treat 19, 185–188 (1977). https://doi.org/10.1007/BF01166996

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  • DOI: https://doi.org/10.1007/BF01166996

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