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Numerical verification for instrumented spherical indentation techniques in determining the plastic properties of materials

Published online by Cambridge University Press:  31 January 2011

Taihua Zhang ,
Peng Jiang ,
Yihui Feng  and
Rong Yang
Taihua Zhang*
Affiliation:
State Key Laboratory of Nonlinear Mechanics (LNM), Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, China
Peng Jiang
Affiliation:
State Key Laboratory of Nonlinear Mechanics (LNM), Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, China; and National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China
Rong Yang
Affiliation:
State Key Laboratory of Nonlinear Mechanics (LNM), Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, China
*
a) Address all correspondence to this author. e-mail: zhangth@lnm.imech.ac.cn
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Abstract

Instrumented indentation tests have been widely adopted for elastic modulus determination. Recently, a number of indentation-based methods for plastic properties characterization have been proposed, and rigorous verification is absolutely necessary for their wide application. In view of the advantages of spherical indentation compared with conical indentation in determining plastic properties, this study mainly concerns verification of spherical indentation methods. Five convenient and simple models were selected for this purpose, and numerical experiments for a wide range of materials are carried out to identify their accuracy and sensitivity characteristics. The verification results show that four of these five methods can give relatively accurate and stable results within a certain material domain, which is defined as their validity range and has been summarized for each method.

Keywords

HardnessNanoindentationStress/strain relationship

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Type
Articles
Information
Journal of Materials Research , Volume 24 , Issue 12 , December 2009 , pp. 3653 - 3663
Copyright
Copyright © Materials Research Society 2009

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