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Measurements of mechanical properties of α-phase in Cu–Sn alloys by using instrumented nanoindentation

Published online by Cambridge University Press:  23 September 2011

Yang Li ,
Kang He ,
Chengwei Liao  and
Chunxu Pan
Yang Li
Affiliation:
School of Physics and Technology and Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education, Wuhan University, Wuhan, 430072, China
Kang He
Affiliation:
School of Physics and Technology and Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education, Wuhan University, Wuhan, 430072, China
Chengwei Liao
Affiliation:
School of Physics and Technology and Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education, Wuhan University, Wuhan, 430072, China
Chunxu Pan*
Affiliation:
School of Physics and Technology and Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education, Wuhan University, Wuhan, 430072, China; and Center for Archaeometry, Wuhan University, Wuhan, 430072, China
*
a)Address all correspondence to this author. e-mail: cxpan@whu.edu.cn
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Abstract

Instrumented nanoindentation technique is a powerful approach for accurately measuring mechanical properties of materials in micron or even nanoscale. In this article, the effect of tin (Sn) content upon mechanical properties of the α-phase in Cu–Sn alloys was studied by using an instrumented nanoindentation. The experimental results revealed that: (i) the hardness of the α-phase exhibited a linear relationship with Sn content (C) increasing, i.e., H = 0.0757C + 0.8916, when it was less than the maximum solid solubility (15.8 wt.%), which is in good agreement with the Friedel–Mott–Suzuki theory; (ii) the variation of Young’s modulus in a narrow range of 120–130 GPa is attributed to orientation variation of the α-phase in casting Cu–Sn dendrites.

Keywords

NanoindentationAlloyHardness
Type
Articles
Information
Journal of Materials Research , Volume 27 , Issue 1: Focus Issue: Instrumented Indentation , 14 January 2012 , pp. 192 - 196
Copyright
Copyright © Materials Research Society 2011

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