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Influence of casting temperature on microstructures and mechanical properties of Cu50Zr45.5Ti2.5Y2 metallic glass prepared using copper mold casting

Published online by Cambridge University Press:  31 January 2011

Zhengwang Zhu ,
Haifeng Zhang ,
Hao Wang ,
Bingzhe Ding ,
Zhuang-Qi Hu  and
Han Huang
Zhengwang Zhu
Affiliation:
Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China; and Faculty of Engineering and Surveying, The University of Southern Queensland, Toowoomba, Queensland 4350, Australia
Haifeng Zhang*
Affiliation:
Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
Hao Wang
Affiliation:
Faculty of Engineering and Surveying, The University of Southern Queensland, Toowoomba, Queensland 4350, Australia
Zhuang-Qi Hu
Affiliation:
Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
Han Huang
Affiliation:
Division of Mechanical Engineering, School of Engineering, The University of Queensland, Brisbane, Queensland 4072, Australia
*
a) Address all correspondence to this author.e-mail:hfzhang@imr.ac.cn
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Abstract

The influence of casting temperatures on microstructures and mechanical properties of rapidly solidified Cu50Zr45.5Ti2.5Y2 alloy was investigated. With increasing casting temperatures, the amount of the crystalline phase decreases. At a high casting temperature, i.e., 1723 K, glass-forming ability (GFA) of the present alloy is enhanced. The results imply that adjusting the casting temperature could be used for designing the microstructures of bulk metallic glass matrix composite. Nanoindentation tests indicated that CuZr phases are slightly softer and can accommodate more plastic deformation than the amorphous matrix. Compression tests confirmed that this kind of second phase (CuZr) precipitated under lower casting temperatures helps to initiate multiple shear bands, resulting in a great improvement in mechanical properties of the samples. Our work indicates that casting temperatures have a great influence on GFA, microstructures, and mechanical properties of the rapidly solidified alloy, therefore controlling the casting temperature is crucial to the production of BMGs.

Keywords

AmorphousMicrostructureRapid solidification
Type
Articles
Information
Journal of Materials Research , Volume 24 , Issue 10 , October 2009 , pp. 3108 - 3115
Copyright
Copyright © Materials Research Society 2009

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