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Indentation creep revisited

Published online by Cambridge University Press:  15 August 2011

In-Chul Choi ,
Byung-Gil Yoo ,
Yong-Jae Kim  and
Jae-il Jang
In-Chul Choi
Affiliation:
Division of Materials Science and Engineering, Hanyang University, Seoul 133-791, Korea
Byung-Gil Yoo
Affiliation:
Division of Materials Science and Engineering, Hanyang University, Seoul 133-791, Korea
Yong-Jae Kim
Affiliation:
Division of Materials Science and Engineering, Hanyang University, Seoul 133-791, Korea
Jae-il Jang*
Affiliation:
Division of Materials Science and Engineering, Hanyang University, Seoul 133-791, Korea
*
a)Address all correspondence to this author. e-mail: jijang@hanyang.ac.kr
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Abstract

Recent extensive nanomechanical experiments have revealed that the instantaneous strength and plasticity of a material can be significantly affected by the size (of sample, microstructure, or stressed zone). One more important property to be added into the list of size-dependent properties is time-dependent plastic deformation referred to as creep; it has been reported that the creep becomes more active at the small scale. Analyzing the creep in the small scale can be valuable not only for solving scientific curiosity but also for obtaining practical engineering information about the lifetime or durability of advanced small-scale structures. For the purpose, nanoindentation creep experiments have been widely performed by far. Here we critically review the existing nanoindentation creep methods and the related issues and finally suggest possible novel ways to better estimate the small-scale creep properties.

Keywords

HardnessNanoindentationStress–strain relationship
Type
Reviews
Information
Journal of Materials Research , Volume 27 , Issue 1: Focus Issue: Instrumented Indentation , 14 January 2012 , pp. 3 - 11
Copyright
Copyright © Materials Research Society 2011

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