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Microstructure evolution and enhanced mechanical properties of hot rolled Mg–3Al–Zn alloy with the addition of Al and Si as a eutectic alloy

Published online by Cambridge University Press:  27 June 2017

Liuwei Zheng ,
Kaibo Nie ,
Huihui Nie ,
Wanggang Zhang ,
Wei Liang  and
Yide Wang
Liuwei Zheng
Affiliation:
Shanxi Key Laboratory of Advanced Magnesium-based Materials, Taiyuan 030024, China; and College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China
Kaibo Nie
Affiliation:
Shanxi Key Laboratory of Advanced Magnesium-based Materials, Taiyuan 030024, China; and College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China
Huihui Nie
Affiliation:
Shanxi Key Laboratory of Advanced Magnesium-based Materials, Taiyuan 030024, China; College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China; and Shanxi Institute of Energy, Taiyuan 030600, China
Wanggang Zhang
Affiliation:
Shanxi Key Laboratory of Advanced Magnesium-based Materials, Taiyuan 030024, China; and College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China
Wei Liang*
Affiliation:
Shanxi Key Laboratory of Advanced Magnesium-based Materials, Taiyuan 030024, China; and College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China
Yide Wang
Affiliation:
Shanxi Key Laboratory of Advanced Magnesium-based Materials, Taiyuan 030024, China; and Taiyuan Iron and Steel (Group) Co., LTD, Taiyuan 030003, China
*
a) Address all correspondence to this author. e-mail: liangwei@tyut.edu.cn
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Abstract

Mg–3Al–Zn alloy with the addition of Al and Si as a eutectic alloy was subjected to conventional hot rolling. The corresponding mechanical properties, microstructure evolution, and dynamic recrystallization mechanism were investigated by optical microscope, scanning electron microscope, electron backscattered diffraction (EBSD), and tensile tests. The experimental results indicated that the Mg–3(Al–Si)–Zn alloy had a microstructure refinement, thus rendering an enhanced mechanical properties in comparison with the Mg–3Al–Zn alloy. The refined Mg2Si particles could act as potential nucleation sites for recrystallization in as-rolled Mg–3(Al–Si)–Zn alloy sheets, which resulted in more completely recrystallized regions through particle stimulated nucleation and a weakened basal texture compared to Mg–3Al–Zn alloy. The improvement in the tensile strength of the as-rolled Mg–3(Al–Si)–Zn alloy can be attributed to grain refinement and second phase strengthening caused by the refined Mg2Si particles.

Keywords

mechanical propertiesmicrostructureAl–Si eutectic alloyrecrystallizationtexture
Type
Articles
Information
Journal of Materials Research , Volume 32 , Issue 18 , 28 September 2017 , pp. 3564 - 3573
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Copyright
Copyright © Materials Research Society 2017 

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Footnotes

Contributing Editor: Jürgen Eckert

References

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