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The mechanical properties of superplastic materials

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Abstract

The relationship between stress and strain rate is often sigmoidal in superplastic materials, with a low strain rate sensitivity at low and high strain rates (regions I and III, respectively) and a high strain rate sensitivity at intermediate strain rates (region II) where the material exhibits optimal superplasticity. This relationship is examined in detail, with reference both to the conflicting results reported for the Zn-22 pct Al eutectoid alloy and to the significance of the three regions of flow.

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  1. Departments of Materials Science and Mechanical Engineering, University of Southern California, 90007, Los Angeles, CA

    Terence G. Langdon (Professor)

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This paper is based on a presentation made at the symposium “On the Mechanical, Microstructural and Fracture Processes in Superplasticity” held at the annual meeting of the AIME in Pittsburgh, PA on October 7, 1980 under the sponsorship of the Flow and Fracture Activity of the Materials Science Division of ASM.

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Langdon, T.G. The mechanical properties of superplastic materials. Metall Trans A 13, 689–701 (1982). https://doi.org/10.1007/BF02642383

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