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Mechanical properties and anisotropy of AZ31 alloy sheet processed by flat extrusion container

Published online by Cambridge University Press:  04 April 2013

Qingshan Yang
Affiliation:
Material Science Department, College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China; andLaboratory for Rolling of Mg Alloy, National Engineering Research Center for Magnesium Alloys, Chongqing University, Chongqing 400044, China
Bin Jiang*
Affiliation:
Material Science Department, College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China; Laboratory for Rolling of Mg Alloy, National Engineering Research Center for Magnesium Alloys, Chongqing University, Chongqing 400044, China; andLight Alloy Department, Chongqing Academy of Science and Technology, Chongqing 401123, China
Jiahong Dai
Affiliation:
Material Science Department, College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China
Ruihong Li
Affiliation:
Material Science Department, College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China
Fusheng Pan
Affiliation:
Laboratory for Rolling of Mg Alloy, National Engineering Research Center for Magnesium Alloys, Chongqing University, Chongqing 400044, China; andLight Alloy Department, Chongqing Academy of Science and Technology, Chongqing 401123, China
*
a)Address all correspondence to this author. e-mail: jiangbinrong@cqu.edu.cn
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Abstract

The microstructure evolution and mechanical responses are investigated in uniaxial tensile test performed on AZ31 magnesium alloy sheets processed by the flat extrusion container. A novel emphasis based on the texture was used to estimate the relative magnitude of hardening effects related to the deformation twinning. The anisotropic behavior of the sheets is sensitive to the orientation of the crystals with respect to the loading direction. This is ascribed to the effect of the initial texture and the activation of their relative critical resolved shear stresses on slip and twinning. The increased accumulated hardening increases the twin nucleation stress. The deformation twinning significantly induces an asymmetry in the yield behavior. Moreover, it remarkably prolongs the slope of the stage II in the working hardening curve. An accepted notion is proposed that the preferential activity of deformation twinning exerts a significant effect on mechanical anisotropy during tension.

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Articles
Copyright
Copyright © Materials Research Society 2013 

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