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Enhancement of ductility in Mg–3Al–1Zn alloy with tilted basal texture by electropulsing

Published online by Cambridge University Press:  31 January 2011

Lei Guan ,
Guoyi Tang ,
Paul K. Chu  and
Yanbin Jiang
Lei Guan
Affiliation:
Advanced Materials Institute, Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, China Chee Avenue, Kowloon, Hong Kong, China; and Department of Physics and Materials Science, City University of Hong Kong, Tat
Guoyi Tang*
Affiliation:
Advanced Materials Institute, Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, China Chee Avenue, Kowloon, Hong Kong, China
Paul K. Chu*
Affiliation:
Department of Physics and Materials Science, City University of Hong Kong, Tat
Yanbin Jiang
Affiliation:
Advanced Materials Institute, Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, China Chee Avenue, Kowloon, Hong Kong, China
*
a) e-mail: tanggy@mail.tsinghua.edu.cn
b) e-mail: paul.chu@cityu.edu.hk
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Abstract

The microstructure and texture evolution in a cold-rolled AZ31 magnesium alloy during electropulsing treatment (EPT) are investigated and correlated with the mechanical properties. The microstructure is effectively refined, and a tilted basal texture develops gradually during EPT. The yield stress in the treated samples is lower than that in the cold-rolled sample, indicating that texture softening is dominant over strengthening because of grain refinement. The phenomenon is primarily the result of the tilted basal texture. EPT improves the tensile ductility of the EPT samples significantly, albeit slightly compromising the tensile strength. The mechanism of the microstructure evolution during electropulsing is discussed from the viewpoint of grain-boundary motion. Moreover, the ductility enhancement is discussed in terms of the deformation mechanism and texture of the Mg alloy.

Keywords

ElectromigrationMgTexture

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Type
Articles
Information
Journal of Materials Research , Volume 24 , Issue 12 , December 2009 , pp. 3674 - 3679
Copyright
Copyright © Materials Research Society 2009

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References

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