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Enhanced Plasticity of Zr-based Bulk Metallic Glass Matrix Composite with Ductile Reinforcement

Published online by Cambridge University Press:  03 March 2011

Y.F. Sun ,
B.C. Wei ,
Y.R. Wang ,
W.H. Li  and
C.H. Shek
Y.F. Sun
Affiliation:
Research Center for Materials, Department of Materials Science and Engineering,Zhengzhou University, Zhengzhou 450002, People’s Republic of China; and
B.C. Wei
Affiliation:
National Microgravity Lab, Institute of Mechanics, Chinese Academy of Sciences,Beijing 10080, People’s Republic of China
Y.R. Wang
Affiliation:
National Microgravity Lab, Institute of Mechanics, Chinese Academy of Sciences,Beijing 10080, People’s Republic of China
W.H. Li
Affiliation:
National Microgravity Lab, Institute of Mechanics, Chinese Academy of Sciences,Beijing 10080, People’s Republic of China
C.H. Shek*
Affiliation:
Department of Physics and Materials Science, City University of Hong Kong, Hong Kong
*
a) Address all correspondence to this author. e-mail: [email protected]
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Abstract

A composite material containing uniformly distributed micrometer-sized Nb particles in a Zr-based amorphous matrix was prepared by suction cast. The resulting material exhibits high fractured strength over 1550 MPa and enhanced plastic strain of about 29.7% before failure in uniaxial compression test at room temperature. Studies of the serrations on the stress–strain curves and the shear bands on the fractured samples reveal that the amplitude of the stress drop of each serration step corresponds to the extent of the propagation of a single shear band through the materials. The composite exhibits more serration steps and smaller amplitude of stress drop due to the pinning of shear band propagation by ductile Nb particles.

Keywords

CompositeMechanical propertiesMetallic glass
Type
Articles
Information
Journal of Materials Research , Volume 20 , Issue 9 , September 2005 , pp. 2386 - 2390
Copyright
Copyright © Materials Research Society 2005

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References

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