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Hardening of copper and nickel alloys during pre-recrystallization annealing and softening during secondary deformation

  • Nonferrous Metals and Alloys
  • Published:
Metal Science and Heat Treatment Aims and scope

Conclusions

  1. 1.

    Secondary deformation of both metals and single- and two-phase alloys hardened as a result of the first deformation and pre-recrystallization annealing (or aging) results in considerable softening.

  2. 2.

    Softening is observed after slight reduction during secondary deformation (1–5%) and it mostly takes the form of a reduction to resistance to small plastic deformations.

  3. 3.

    Secondary plastic deformation after primary deformation in the same direction improves the elastic limit, but does not alter the anisotropy of the latter. A change in the direction of secondary deformation leads to alteration of the anisotropy of the elastic limit by increasing hardness in some directions and softening the alloy in others.

  4. 4.

    Secondary plastic deformation of alloys after primary deformation and pre-recrystallization annealing causes softening in all directions, although to a different degree. The nature of the anisotropy depends on the direction of the secondary deformation with respect to the original direction.

  5. 5.

    The Konobeevskii-Rovenskii effect is based on polygonization during pre-recrystallization annealing and disturbance of the polygonized substructure during secondary deformation. This effect is of a general nature and is natural both in pure metals and alloys; in alloys changes in fine structure are complicated by processes involving redistribution of the component atoms and therefore have a strong effect on the degree of hardening and softening.

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Literature cited

  1. S. T. Konobeevskii, Coll. Scientific reports of metal science and heat treatment section of VNITO of metalurgists [in Russian], Moscow (1940); Zhurnal eksperimental'noi i teoreticheskoi fiziki,13, No. 6 (1943).

  2. B. I. Puchkov et al., FMM,16, No. 5 (1963).

  3. B. L. Puchkov et al., MiTOM, No. 1 (1962).

  4. B. L. Puchkov et al., Tsvetnye metally, No. 6 (1960).

  5. B. I. Puchkov et al., FMM,13, No. 5 (1962).

  6. A. G. Rakhshtadt and M. A. Stremel', Metal science and heat treatment [in Russian]. Coll. No. 41 Bauman MVTU (1955).

  7. E. N. Spektor et al., FRMM,17, No. 3 (1964).

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Authors and Affiliations

  1. Bauman Institute, Giprotsvetmetobrabotka, Moscow, USSR

    B. I. Puchkov, A. G. Rakhshtadt, I. L. Rogel'berg & A. L. Gavze

Authors
  1. B. I. Puchkov
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  2. A. G. Rakhshtadt
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  3. I. L. Rogel'berg
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  4. A. L. Gavze
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Additional information

Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 3, pp. 17–22, March, 1965

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Puchkov, B.I., Rakhshtadt, A.G., Rogel'berg, I.L. et al. Hardening of copper and nickel alloys during pre-recrystallization annealing and softening during secondary deformation. Met Sci Heat Treat 7, 156–161 (1965). https://doi.org/10.1007/BF00658524

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  • DOI: https://doi.org/10.1007/BF00658524

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