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Strengthening mechanism of alloy AL19 with microadditions of cadmium

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

Conclusions

  1. 1.

    Solution of cadmium and the Cu-50% Cd master alloy in a melt of alloy AL19 takes a long time. The process can be accelerated by stirring or ultrasonic treatment.

  2. 2.

    At concentrations up to 0.1%, cadmium has high surface activity in liquid alloy AL19: The surface tension of the melt decreases and also the interphase tension at the melt-crystal boundary, the cadmium being adsorbed in the surface layer. This favors the formation of a fine-grained structure in the ingot and an increase in strength.

  3. 3.

    With a cadmium concentration over 0.1%, the cadmium is redistributed between the inner volumes and the surface and the density of the melt decreases, which is evidently due to formation of nuclei of copper-cadmium-vacancy clusters; the structure of the ingot becomes coarser and the strength decreases.

  4. 4.

    The modifying and strengthening effects of cadmium are greatest for the cast alloy with a concentration around 0.1%.

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Authors
  1. P. S. Popel'
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  2. V. M. Zamyatin
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  3. Y. A. Bazin
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  4. B. P. Domashnikov
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Additional information

Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 8, pp. 39–42, August, 1983.

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Popel', P.S., Zamyatin, V.M., Bazin, Y.A. et al. Strengthening mechanism of alloy AL19 with microadditions of cadmium. Met Sci Heat Treat 25, 608–611 (1983). https://doi.org/10.1007/BF00741924

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  • DOI: https://doi.org/10.1007/BF00741924

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