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Can Young’s modulus and hardness of wire structural materials be directly measured using nanoindentation?

Published online by Cambridge University Press:  31 January 2011

S.Q. Shu ,
Y. Yang ,
T. Fu ,
C.S. Wen  and
J. Lu
S.Q. Shu
Affiliation:
Department of Mechanical Engineering, the Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China
Y. Yang
Affiliation:
Department of Mechanical Engineering, the Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China
T. Fu
Affiliation:
Department of Mechanical Engineering, the Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China
C.S. Wen
Affiliation:
Department of Mechanical Engineering, the Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China
J. Lu*
Affiliation:
Department of Mechanical Engineering, the Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China
*
a) Address all correspondence to this author. e-mail: Jian.Lu@inet.polyu.edu.hk
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Abstract

In recent studies, nanoindentation experiments combined with the Oliver and Pharr method (OP method) are frequently used to measure the mechanical properties of “one-dimensional” structural materials (micro/nanowires and nanobelts) regardless of the corresponding assumptions of the OP method. This article reports the numerical simulation studies of the nanoindentations of wire structural materials on elastic-plastic substrates using dimensional analysis and the finite element method. We find that the measured hardness and Young’s modulus of wire structural materials are significantly influenced by their geometries and indenters as well as the mechanical properties of substrates and wires.

Type
Articles
Information
Journal of Materials Research , Volume 24 , Issue 3 , March 2009 , pp. 1054 - 1058
Copyright
Copyright © Materials Research Society 2009

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