High temperature deformation behaviour of a Mg-0.8Al alloy

Kottada, Ravi S. ; Chokshi, Atul H. (2004) High temperature deformation behaviour of a Mg-0.8Al alloy Materials Science Forum, 447-448 . pp. 227-232. ISSN 0255-5476

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Official URL: http://www.scientific.net/MSF.447-448.227

Related URL: http://dx.doi.org/10.4028/www.scientific.net/MSF.447-448.227


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 μmm 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:Article
Source:Copyright of this article belongs to Trans Tech Publications Inc.
Keywords:Magnesium Alloys; Creep; Superplasticity; Grain Boundary Sliding
ID Code:84155
Deposited On:24 Feb 2012 11:29
Last Modified:24 Feb 2012 11:29

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