Superplasticity resulting from cooperative grain boundary sliding

A physical model of superplastic deformation based on the experimental evidence for the existence of cooperative grain boundary sliding (CGBS) is proposed. This approach shifts the focus of attention to the analysis of CGBS bands formation conditions and to the evaluation of their amount necessary f...

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Bibliographic Details
Published inActa materialia Vol. 46; no. 14; pp. 4911 - 4916
Main Authors Kaibyshev, O.A., Pshenichniuk, A.I., Astanin, V.V.
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 01.09.1998
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Summary:A physical model of superplastic deformation based on the experimental evidence for the existence of cooperative grain boundary sliding (CGBS) is proposed. This approach shifts the focus of attention to the analysis of CGBS bands formation conditions and to the evaluation of their amount necessary for superplastic flow. The model accurately reproduces the observed dependencies of the flow stress on the strain rate, gives a new physical meaning to the superplasticity strain rate interval, and provides a basis for explanation of such phenomena as the high strain rate superplasticity and influence of a sample thickness on superplastic properties of materials.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:1359-6454
1873-2453
DOI:10.1016/S1359-6454(98)00197-9