Table of Contents
Journal of Metallurgy
Volume 2011, Article ID 165307, 10 pages
http://dx.doi.org/10.1155/2011/165307
Research Article

Transition in Deformation Mechanism of AZ31 Magnesium Alloy during High-Temperature Tensile Deformation

1Department of Mechanical Science and Engineering, Chiba Institute of Technology, 2-17-1, Tsudanuma, Narashino, Chiba 275-0016, Japan
2Materials Technology Division, Railway Technical Research Institute, 2-8-38, Hikari-machi, Kokubunji, Tokyo 185-8540, Japan

Received 24 December 2010; Revised 20 April 2011; Accepted 6 May 2011

Academic Editor: Chong Soo Lee

Copyright © 2011 Masafumi Noda 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

Magnesium alloys can be used for reducing the weight of various structural products, because of their high specific strength. They have attracted considerable attention as materials with a reduced environmental load, since they help to save both resources and energy. In order to use Mg alloys for manufacturing vehicles, it is important to investigate the deformation mechanism and transition point for optimizing the material and vehicle design. In this study, we investigated the transition of the deformation mechanism during the high-temperature uniaxial tensile deformation of the AZ31 Mg alloy. At a test temperature of 523 K and an initial strain rate of  s−1, the AZ31 Mg alloy (mean grain size: ~5 μm) exhibited stable deformation behavior and the deformation mechanism changed to one dominated by grain boundary sliding.