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Effect of original grain size on structure and properties of copper alloys after deformation and annealing

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

Conclusions

  1. 1.

    Reduction of the original grain size (before deformation) from 200 to ∼30 μ leads to an increase in the strength characteristics, electrical resistivity, and width of x-ray lines in deformed bronze Br. A7 and brass L68 and substantially increases the strengthening effect during subrecrystallization annealing.

    TABLE 1

    Alloy

    ɛ, %

    σ0

    K

    Br.A7

    20

    22/22

    3,5/7,0

    50

    41/60

    2,0/4,5

    75

    44/75

    0,5/4,0

    L68

    20

    28/28

    1,0/2,0

    50

    38/50

    0,5/1,5

    75

    42/60

    0,5/2,0

    1. Note.Numerators give the values of σ0and K after deformation, denominators—after deformation and subrecrystallizationannealing.
  2. 2.

    With increasing deformation the effect of the grain size on the elastic limit decreases, while the effect on the ultimate strength and yield strength remains almost unchanged. After annealing, the effect of the original grain size on the strength characteristics increases spharply as compared with the deformed condition.

  3. 3.

    Subrecrystallization annealing sharply increases the resistance to deformation of the grain boundaries, and in alloys deformed 50 and 75% substantially increases the resistance to deformation in slip bands.

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Literature cited

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Authors
  1. N. P. Gorlenko
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  2. A. G. Rakhshtadt
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  3. V. M. Rozenberg
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  4. É. N. Spektor
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  5. O. A. Treteikina
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Additional information

State Scientific-Research and Design Institute of Alloys and Treatment of Nonferrous Metals. N. É. Bauman Moscow Technical College. Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 3, pp. 38–41, March, 1977.

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Gorlenko, N.P., Rakhshtadt, A.G., Rozenberg, V.M. et al. Effect of original grain size on structure and properties of copper alloys after deformation and annealing. Met Sci Heat Treat 19, 204–207 (1977). https://doi.org/10.1007/BF01167001

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  • DOI: https://doi.org/10.1007/BF01167001

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