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Plasticity improvement of Zr55Al10Ni5Cu30 bulk metallic glass by remelting master alloy ingots

Published online by Cambridge University Press:  31 January 2011

Yong Hu ,
Jinfu Li ,
Tao Lin  and
Yaohe Zhou
Yong Hu
Affiliation:
State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, People's Republic of China; and School of Materials Science and Engineering, Taiyuan University of Science and Technology, Taiyuan 030024, People's Republic of China
Jinfu Li*
Affiliation:
State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, People's Republic of China; and School of Materials Science and Engineering, Taiyuan University of Science and Technology, Taiyuan 030024, People's Republic of China
Yaohe Zhou
Affiliation:
State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, People's Republic of China
*
a) Address all correspondence to this author. e-mail: [email protected]
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Abstract

The effect of repeated melting of master alloy ingots on the bending properties of Zr55Al10Ni5Cu30 bulk metallic glass (BMG) was investigated. The bending plasticity of Zr55Al10Ni5Cu30 BMG was found to be improved with the increased remelting times. When remelted 10 times, the BMG sample cast from the master alloy ingot undergoes bending, but it does not fracture even though the bending angle increases to 100°; the maximum bending stress and elastic strain remain almost constant. The bending plasticity improvement may be attributed to the fact that the increased remelting times result in more free volume and more disorder and homogeneous microstructure in the BMG, which favors the initial nucleation of profuse shear bands and reduces the probability of catastrophic fracture.

Keywords

AmorphousDuctilityMicrostructure
Type
Articles
Information
Journal of Materials Research , Volume 24 , Issue 12 , December 2009 , pp. 3590 - 3595
Copyright
Copyright © Materials Research Society 2009

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