The mechanical properties of superplastic materials

descriptionPublicationkeyboard_double_arrow_right Article 01 May 1982 English Publisher:Springer Science and Business Media LLCJournal:Metallurgical Transactions A, volume 13, pages 689-701 (issn: 0360-2133, eissn: 2379-0180,

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Authors: Terence G. Langdon;

doi: 10.1007/bf02642383

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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