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Changes in properties as the result of aging martensite in chromium-nickel steels

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Metal Science and Heat Treatment Aims and scope

Conclusions

  1. 1)

    The changes in the properties of Cr\t-Ni steels with a martensitic structure alloyed with Al, Cu, Al+Mo, or Cu+Mo which result from aging occur in two stages. Aging is limited by diffusion at all stages. During the initial stage the determining factor is the \lddrift\rd of dissolved atoms toward dislocations under the effect of the stressfield, while during the second stage the determining factor is normal diffusion due to the chemical gradient.

    In steels containing Mo the second stage of aging is very weakly expressed.

  2. 2)

    Hardening induced by aging is apparently due to the initial stage of decompostion, when the dislocations become pinned. The aging of steels containing Cu or Al is due to the formation of precipitates which can be made evident by microscopic and electronographic analysis.

  3. 2)

    The concentration and the character of structural defects affect the kinetics of hardening and softening during aging. Martensite formed as the result of treatment at very low temperature and possessing a large number of crystals with internal twins softens the least rapidly.

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Literature cited

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Authors
  1. V. B. Spiridonov
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  2. Yu. A. Skakov
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  3. V. N. Iordanskii
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Additional information

Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 11, pp. 19–24, November, 1964

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Spiridonov, V.B., Skakov, Y.A. & Iordanskii, V.N. Changes in properties as the result of aging martensite in chromium-nickel steels. Met Sci Heat Treat 6, 676–679 (1964). https://doi.org/10.1007/BF00648716

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  • DOI: https://doi.org/10.1007/BF00648716

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