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The deformation structure of the superplastic Zn–Al alloy by P Málek is a Engineering article available to read on EtoBox.

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Fine grained (d$1 mm) and coarse grained (d\20 mm) samples of the Zn-1.1 wt.% Al alloy were strained in a broad range of temperatures and strain rates corresponding both to the optimum superplastic region II and to the non-superplastic region I. The evolution of the microstructure during straining was studied and compared with the assumptions of the co-operative grain boundary sliding model. No pronounced localization of grain boundary sliding was found during straining at optimum superplastic strain rates. A tendency toward sliding of groups of grains was observed during straining at low strain rates. The stress dependence of the size of these grain groups might be a possible reason for the origin of the non-superplastic region I at low strain rates.

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Author

P Málek

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0921-5093)

Published

1999

Language

EN

Field

Engineering (Physical Sciences)