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The drop in strength at cryogenic temperatures

  • Steels and Alloys for Cryogenic Technology
  • Published:
Metal Science and Heat Treatment Aims and scope

Conclusions

  1. 1.

    Reduction of the ultimate strength with decreasing temperatures in fcc materials indicates embrittlement of the material.

  2. 2.

    The reduction of the strength with decreasing temperature is due to the reduction of the effective surface energy, i.e., the increase of the resistance to plastic deformation with the occurrence of a crack at stresses close to the yield strength.

  3. 3.

    The effect of stress concentrations on the mechanical properties is the decisive factor in judging the operational properties of a material.

  4. 4.

    Microplastic deformation by twinning in the elastic region, leading to stress concentration centers at cryogenic temperatures, does not lower the yield strength but only predetermines the possible reduction of the ultimate strength.

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Literature cited

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Authors
  1. D. V. Lebedev
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Additional information

central Scientific-Research Institute of Ferrous Metallurgy. Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 3, pp. 12–14, March, 1971.

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Lebedev, D.V. The drop in strength at cryogenic temperatures. Met Sci Heat Treat 13, 189–192 (1971). https://doi.org/10.1007/BF00652787

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  • DOI: https://doi.org/10.1007/BF00652787

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