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Indentation creep of a Ti-based metallic glass

Published online by Cambridge University Press:  31 January 2011

Y.J. Huang ,
Y.L. Chiu ,
J. Shen ,
J.J.J. Chen  and
J.F. Sun
Y.J. Huang
Affiliation:
School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China; and Department of Chemical and Materials Engineering, University of Auckland, Auckland 1142, New Zealand
Y.L. Chiu*
Affiliation:
Department of Chemical and Materials Engineering, University of Auckland, Auckland 1142, New Zealand; and Department of Metallurgy and Materials, University of Birmingham, Edgbaston B15 2TT, United Kingdom
J. Shen*
Affiliation:
School of Materials Science and Engineering and Micro/Nano Technology Research Center, Harbin Institute of Technology, Harbin 150001, China
J.J.J. Chen
Affiliation:
Department of Chemical and Materials Engineering, University of Auckland, Auckland 1142, New Zealand
J.F. Sun
Affiliation:
School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China
*
a) Address all correspondence to these authors. e-mail: y.chiu@bham.ac.uk
b) e-mail: junshen@hit.edu.cn
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Abstract

In this work, the time-dependent plastic deformation behavior of Ti40Zr25Ni3Cu12Be20 bulk and ribbon metallic glass alloys was investigated using a nanoindentation technique at room temperature with the applied load ranging from 5 to 100 mN. The stress exponent n, defined as, has been derived as a measure of the creep resistance. It was found that the measured stress exponent increases rapidly with increasing indentation size, exhibiting a positive size effect. The size effect on the stress exponent n obtained from the bulk sample is more pronounced than that obtained from the ribbon sample. The deformation mechanism involved will be discussed.

Keywords

AlloyAmorphousNanoindentation
Type
Articles
Information
Journal of Materials Research , Volume 24 , Issue 3 , March 2009 , pp. 993 - 997
Copyright
Copyright © Materials Research Society 2009

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