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Enhancement of plasticity in Zr-based bulk metallic glasses

Published online by Cambridge University Press:  31 January 2011

X.D. Wang ,
L. Yang ,
J.Z. Jiang ,
K. Saksl ,
H. Franz ,
H-J. Fecht ,
Y.G. Liu  and
H.S. Xian
X.D. Wang*
Affiliation:
International Center for New-Structured Materials (ICNSM) and Laboratory of New-Structured Materials, Department of Materials Science and Engineering, Zhejiang University, Hangzhou, 310027, People’s Republic of China
L. Yang
Affiliation:
International Center for New-Structured Materials (ICNSM) and Laboratory of New-Structured Materials, Department of Materials Science and Engineering, Zhejiang University, Hangzhou, 310027, People’s Republic of China
J.Z. Jiang*
Affiliation:
International Center for New-Structured Materials (ICNSM) and Laboratory of New-Structured Materials, Department of Materials Science and Engineering, Zhejiang University, Hangzhou, 310027, People’s Republic of China
K. Saksl
Affiliation:
HASYLAB am DESY, D-22603 Hamburg, Germany
H. Franz
Affiliation:
HASYLAB am DESY, D-22603 Hamburg, Germany
H-J. Fecht
Affiliation:
Department of Materials, Faculty of Engineering, University of Ulm, D-89081 Ulm, Germany; and Forschungszentrum Karlsruhe, Institut für Nanotechnologie, Karlsruhe, Germany
Y.G. Liu
Affiliation:
Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, People’s Republic of China
H.S. Xian
Affiliation:
Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, People’s Republic of China
*
a)Address all correspondence to these authors. e-mail: wxdongdut@yahoo.com.cn
b)Address all correspondence to these authors. jiangjz@zju.edu.cn
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Abstract

We present evidence that a minor adjustment in Zr/Ni concentration ratio can dramatically enhance the plasticity of monolithic Zr-based bulk metallic glasses (BMGs) from about 2.2% for Zr65Al8Ni10Cu17 BMG to 14% for Zr62Al8Ni13Cu17 BMG. No deformation-induced nanocrystallization appears in a 55% strained Zr62Al8Ni13Cu17 BMG without catastrophic failure while pre-existing nanocrystals in Zr65Al8Ni10Cu17 BMG result in its limited plasticity. Also note that the stability of Zr62Al8Ni13Cu17 BMG against crystallization upon deformation is somewhat higher than that of Zr65Al8Ni10Cu17 BMG. As determined by x-ray diffraction using synchrotron radiation, the enhanced plasticity of Zr62Al8Ni13Cu17 BMG seems to be related to the relative homogeneity of the amorphous structure.

Keywords

AmorphousDuctilityX-ray diffraction (XRD)
Type
Articles
Information
Journal of Materials Research , Volume 22 , Issue 9 , September 2007 , pp. 2454 - 2459
Copyright
Copyright © Materials Research Society 2007

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References

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