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Philosophical Magazine Letters Volume 92, 2012 - Issue 12
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Original Articles

In situ transmission electron microscopy observations of precipitation and a new orientation relationship between γ-Mg17Al12 and magnesium-based matrix in an Mg–Al–Zn–Sn alloy

Yu Liu School of Physics and Technology and Key Laboratory of Artificial Micro- and Nano-Structures of Ministry of Education, Wuhan University, Wuhan 430072, China
,
Dongshan Zhao School of Physics and Technology and Key Laboratory of Artificial Micro- and Nano-Structures of Ministry of Education, Wuhan University, Wuhan 430072, ChinaCorrespondence[email protected]
,
Xin Nie School of Physics and Technology and Key Laboratory of Artificial Micro- and Nano-Structures of Ministry of Education, Wuhan University, Wuhan 430072, China
,
Hongyu Tao School of Physics and Technology and Key Laboratory of Artificial Micro- and Nano-Structures of Ministry of Education, Wuhan University, Wuhan 430072, China
,
Jianbo Wang School of Physics and Technology and Key Laboratory of Artificial Micro- and Nano-Structures of Ministry of Education, Wuhan University, Wuhan 430072, China
&
Jianian Gui School of Physics and Technology and Key Laboratory of Artificial Micro- and Nano-Structures of Ministry of Education, Wuhan University, Wuhan 430072, China
Pages 668-674 | Received 13 Oct 2011, Accepted 19 Jul 2012, Published online: 14 Aug 2012
 
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Abstract

An in situ observation of the precipitation of γ-Mg17Al12 phase in a die-cast Mg–Al–Zn–Sn alloy was performed using a transmission electron microscope equipped with a heating stage maintained at 403 K for 100 min. The addition of a small amount of Sn to the AZ91 system accelerates the development of the γ-Mg17Al12 phase formed during continuous precipitation. A new orientation relationship between the γ-Mg17Al12 precipitate and α-Mg matrix was identified as .

Acknowledgments

This research was supported by National Natural Science Foundation of China (Grant Nos. 51171130, 50771074 and 50571075) and the New Century Excellent Talents in University (Grant No. NCET-07-0640).

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