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Superplastic deformation, cavitation, and fracture of microduplex Cu-Ni-Zn alloys

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Abstract

A study has been made of the superplastic behavior during tensile straining of two α/β Cu-Ni-Zn alloys (nickel silvers). Cavitation occurred during deformation and has been studied using metallographic and density techniques. Cavities nucleated at α/β boundaries and triple points involving two phases, and cavity growth and interlinkage led to brittle superplastic fracture. Density studies showed that the volume of cavities increased with increasing strain, but was relatively independent of strain rate and temperature. The results were consistent with a high rate of cavity nucleation in the early stages of deformation, followed by a grain boundary sliding mechanism of growth.

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Authors and Affiliations

  1. Department of Metallurgy, University of Manchester, Grosvenor Street, Ml 7HS, Manchester, UK

    D. W. Livesey (Graduate Student) & N. Ridley (Senior Lecturer)

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  1. D. W. Livesey
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  2. N. Ridley
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Livesey, D.W., Ridley, N. Superplastic deformation, cavitation, and fracture of microduplex Cu-Ni-Zn alloys. Metall Trans A 9, 519–526 (1978). https://doi.org/10.1007/BF02646409

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