Paper Title:
Constitutive Equations in Creep of the AE44 Magnesium Alloy
  Abstract

The creep behaviour of the AE44 magnesium alloy was described by means of a variation of the composite model, already successfully used to analyse the behaviour of die-cast Mg-Al alloys. Since the microstructure of these alloys is constituted by primary Mg globules surrounded by a divorced eutectic formed by supersaturated a-Mg and precipitates, these materials were compared to a composite with soft (globules) and hard (divorced eutectic) regions, both deforming with a similar strain rate during creep. The strengthening role of the precipitates formed in the hard region during cooling from injection temperature and during creep was expressed by introducing a threshold stress. The agreement between experimental data and model was very good.

  Info
Periodical
Materials Science Forum (Volumes 604-605)
Edited by
Marcello Cabibbo and Stefano Spigarelli
Pages
357-365
DOI
10.4028/www.scientific.net/MSF.604-605.357
Citation
S. Spigarelli, "Constitutive Equations in Creep of the AE44 Magnesium Alloy", Materials Science Forum, Vols. 604-605, pp. 357-365, 2009
Online since
October 2008
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