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Advances in Materials Science and Engineering
Volume 2014, Article ID 356572, 9 pages
http://dx.doi.org/10.1155/2014/356572
Review Article

Influence of Grain Size and Texture on the Yield Strength of Mg Alloys Processed by Severe Plastic Deformation

1School of Applied Science, Taiyuan University of Science and Technology, Wanbailin District, Taiyuan 030024, China
2Center of Rolling Engineering, Taiyuan University of Science and Technology, Taiyuan 030024, China
3National Engineering Research Center for Light Alloy Net Forming, Shanghai Jiao Tong University, Shanghai 200240, China
4ERC of Revolutionizing Metallic Biomaterials, North Carolina A&T State University, Greensboro, NC 27411, USA

Received 26 July 2014; Revised 1 November 2014; Accepted 5 November 2014; Published 25 November 2014

Academic Editor: Tao Zhang

Copyright © 2014 Jinbao Lin 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

Severe plastic deformation (SPD) has been widely employed to refine the grain size of Mg alloys, with the main objective to improve the strength and ductility of Mg alloys, since the well-known Hall-Petch equation suggests that a decreased grain size leads to an increased yield strength. However, the yield strength of Mg alloys processed by SPD is often decreased even though the grain size is effectively reduced. The abnormal flow behavior in Mg alloys processed by SPD has attracted great attention although this mechanism is still unclear, due to its complex and extensive influence factors. In this paper, the relationships between the processing conditions, grain refinement, and mechanical properties of the SPD treated Mg alloys are reviewed, with the emphasis on the effects of grain size and texture on the yield strength.