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Temperature deformation behaviour of a Mg-0.8Al alloy

Kottada, RS and Chokshi, AH (2003) Temperature deformation behaviour of a Mg-0.8Al alloy. In: Materials Science Forum, 447-4 . pp. 227-232.

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Abstract

There is considerable interest currently in developing magnesium based alloys as replacements for aluminum alloys in automobile applications, due to their high specific strength as compared to aluminum alloys. However, the poor formability of magnesium alloys has restricted their applications; superplasticity can be utilized to form components with complex shapes. In the present study, the compressive deformation characteristics of a Mg-0.8 wt% Al alloy with an initial grain size of 19 +/- 1.0 mum have been studied in the temperature range of 623-673 K and at strain rates ranging from 10(-7) to 10(-3) s(-1). The stress exponent was observed to decrease with a decrease in stress. The results are analyzed in terms of the existing theoretical models for high temperature deformation. Furthermore, the potential for superplasticity in this alloy is explored, based on the mechanical and microstructural characteristics of the alloy.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to Trans Tech Publications Inc...
Keywords: creep;grain boundary sliding;magnesium alloys;superplasticity
Department/Centre: Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited: 24 Aug 2011 06:41
Last Modified: 24 Aug 2011 06:41
URI: http://eprints.iisc.ernet.in/id/eprint/40259

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