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Journal of Metallurgy
Volume 2012 (2012), Article ID 674573, 5 pages
http://dx.doi.org/10.1155/2012/674573
Research Article

Investigations on the Plastic Instability in an HCP Mg-Li Alloy

1Environmental Corrosion Center, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
2Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China

Received 24 August 2011; Accepted 30 October 2011

Academic Editor: Michael E. Kassner

Copyright © 2012 C. Wang et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Plastic instability is reported in hexagonal close-packed (HCP) LA41 magnesium alloy during tensile tests. Serration amplitude associated with plastic instability is measured to increase with increasing strain and decrease with increasing strain rate. The model of dynamic strain aging (DSA) is proposed to be the controlling mechanism. Moreover, it is reported that annealing could reduce the flow instability, which has potential practical applications.