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Role of the Microstructure on the Deformation Behavior in Mg12ZnY with a Long-Period Stacking Ordered Structure

Published online by Cambridge University Press:  01 February 2011

Koji Hagihara ,
Naoyuki Yokotani ,
Akihito Kinoshita ,
Yuya Sugino ,
Hiroyuki Yamamoto ,
Michiaki Yamasaki ,
Yoshihito Kawamura  and
Yukichi Umakoshi
Koji Hagihara
Affiliation:
hagihara@mat.eng.osaka-u.ac.jp, Osaka University, Suita, Japan
Naoyuki Yokotani
Affiliation:
naoyuki.yokotani@mat.eng.osaka-u.ac.jp, Osaka University, Suita, Japan
Akihito Kinoshita
Affiliation:
akihito.kinoshita@mat.eng.osaka-u.ac.jp, Osaka University, Suita, Japan
Yuya Sugino
Affiliation:
yuya.sugino@mat.eng.osaka-u.ac.jp, Osaka University, Suita, Japan
Hiroyuki Yamamoto
Affiliation:
hiroyuki.yamamoto@mat.eng.osaka-u.ac.jp, Osaka University, Suita, Japan
Michiaki Yamasaki
Affiliation:
yamasaki@gpo.kumamoto-u.ac.jp, Kumamoto University, Kurokami, Japan
Yoshihito Kawamura
Affiliation:
rivervil@gpo.kumamoto-u.ac.jp, Kumamoto University, Kurokami, Japan
Yukichi Umakoshi
Affiliation:
UMAKOSHI.Yukichi@nims.go.jp, National Institute for Materials Science, Tsukuba, Ibaraki, Japan
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Abstract

The influence of a heat-treatment on the plastic deformation behavior in Mg12ZnY with a long-period stacking ordered (LPSO) structure was investigated by using crystals grown by the Bridgman method. Annealing of the crystal at 798 K for 3 days induced the change in the crystal structure of Mg12ZnY from the 18-fold rhombohedral structure (18R) to the 14-fold hexagonal structure (14H). The plastic behavior of those LPSO crystals showed a large variation depending on the loading axis in both crystals, because of the limitation of operative deformation modes in them. The change in the stacking sequence in the LPSO crystals did not show a large influence on the plastic deformation behavior at room temperature.

Keywords

Mgcrystallographic structurestrength
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1128: Symposium U – Advanced Intermetallic-Based Alloys for Extreme Environment and Energy Applications , 2008 , 1128-U05-53
Copyright
Copyright © Materials Research Society 2009

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References

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