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Investigation of superplasticity by the impression creep technique

Kumar, N and Raman, KS and Sastry, DH and Little, EA (1990) Investigation of superplasticity by the impression creep technique. In: Journal of Materials Science, 25 (1). pp. 753-755.

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Impression creep tests have been carried out on a $Zn-22\% Al$ eutectoid alloy in two heattreatment conditions, as a function of applied stress and at temperatures of $\sim 25$ to $270^0C$. At small grain sizes $(\sim 0.9 \mu m)$ and in the temperature range $\sim 180$ to $270^0C$ the observed deformation response conforms to Regions I, II and III typical of superplastic behaviour. Furthermore, strain-rate index values determined for Region II fall in the range 0.44 to 0.51, consistent with superplasticity. It is concluded that the impression creep technique offers considerable potential for characterization of superplastic alloy systems on small specimen volumes.

Item Type: Journal Article
Publication: Journal of Materials Science
Publisher: Springer
Additional Information: Copyright of this article belongs to Springer.
Department/Centre: Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited: 29 Jun 2007
Last Modified: 18 Jan 2012 06:11
URI: http://eprints.iisc.ac.in/id/eprint/11333

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