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Advances in Materials Science and Engineering
Volume 2015, Article ID 175873, 7 pages
http://dx.doi.org/10.1155/2015/175873
Research Article

Research Difference of Strain Distribution and Microstructure Evolution between Rolling Direction and Transverse Direction of AM50 Mg Alloy Plate by Digital Image Correlation

1School of Material Sciences and Engineering, Shenyang University of Technology, No. 111 Shenliao Road, Shenyang 110780, China
2Center of Excellence in Engineered Fibre Composites, University of Southern Queensland, West Street, Toowoomba, QLD 4350, Australia
3State Key Lab of Rolling & Automation, Northeastern University, Shenyang 110004, China

Received 27 June 2015; Accepted 3 November 2015

Academic Editor: Pavel Lejcek

Copyright © 2015 Qiang Li 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

The rolling direction (RD) and transverse direction (TD) of AM50 Mg alloy plate were drawn by tensile test while Digital Image Correlation (DIC) was applied to record local strain distribution and evolution. Then, the microstructure in the maximum strain position was observed so as to find the reason causing the difference between RD and TD specimen. Finally, the fracture surface morphology of the broken specimen was observed by scanning electron microscope (SEM) to determine the crack types. Through the analysis, it is found that the critical failure equivalent strains in the RD specimen and TD specimen are 0.1675 and 0.118, respectively, and the maximum equivalent strain position is the crack source; more twinning is generated in the RD specimen than that of the TD specimen, which indicates that twinning plays an important role in affecting its plasticity. The fracture surface morphology indicates that the RD specimen fracture is quasi-cleavage fracture while the TD specimen shows character of cleavage fracture.