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Structure and mechanical properties of cast quasicrystal-reinforced Mg–Zn–Al–Y base alloys

Published online by Cambridge University Press:  03 March 2011

Guangyin Yuan ,
Kenji Amiya ,
Hidemi Kato  and
Akihisa Inoue
Guangyin Yuan*
Affiliation:
Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan,and College of Materials Science and Engineering, Shanghai Jiaotong University,Shanghai 200030, People’s Republic of China
Kenji Amiya
Affiliation:
Inoue Superliquid Glass Project, ERATO, Japan Science and Technology Corporation,Sendai 982-0807, Japan
Hidemi Kato
Affiliation:
Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan
Akihisa Inoue
Affiliation:
Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan
*
a)Address all correspondence to this author.Present address: Inoue Laboratory, Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan. e-mail: [email protected]
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Abstract

The structure and mechanical properties of Mg–Zn–Al–Y base cast alloys containing an icosahedral quasicrystal phase (i-phase) as a main strengthening phase were investigated. Mg–8Zn–4Al–xY base bulk alloys containing the i-phase were prepared by casting into a copper mold at moderate cooling rates. The Y addition was effective for decreasing the size of the i-phase and the increasing the homogeneity of its dispersed state. The mechanical properties examined by compression tests at room temperature were much superior to those of a conventional AZ91 Mg alloy. The creep tests at elevated temperatures indicated a promising high temperature creep resistance of the quasicrystal-reinforced Mg–Zn–Al–Y cast alloy. The strengthening mechanism was also discussed.

Keywords

CastingQuasicrystalMechanical properties
Type
Articles
Information
Journal of Materials Research , Volume 19 , Issue 5 , May 2004 , pp. 1531 - 1538
Copyright
Copyright © Materials Research Society 2004

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