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On the uniqueness of stress-strain rate relation for superplastic flow of the Pb-Sn eutectic

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Abstract

The uniqueness of stress-strain rate relation in superplastic deformation of the Pb-Sn eutectic alloy for different grain sizes and test temperatures has been explored after subjecting the deformation processed alloy to a standard tensile prestrain. About 30 pct elongation at 421 K was found to eliminate the mechanical and microstructural instabilities that are characteristic of the as-worked material. After this prestraining, the flow stress was uniquely dependent on strain rate for a given grain size and test temperature, irrespective of the cross head speed, the path through which a particular strain rate is achieved, or the strain.

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Authors and Affiliations

  1. Department of Mechanical Engineering, University of California, Davis

    B. P. Kashyap (Post-doctoral Fellow)

  2. Department of Metallurgical Engineering, Indian Institute of Technology, 208016, Kanpur, India

    G. S. Murty (Professor and Head)

Authors
  1. B. P. Kashyap
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  2. G. S. Murty
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Kashyap, B.P., Murty, G.S. On the uniqueness of stress-strain rate relation for superplastic flow of the Pb-Sn eutectic. Metall Trans A 12, 1923–1925 (1981). https://doi.org/10.1007/BF02643804

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  • DOI: https://doi.org/10.1007/BF02643804

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