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Surface roughness effect in instrumented indentation: A simple contact depth model and its verification

Published online by Cambridge University Press:  03 March 2011

Ju-Young Kim ,
Jung-Jun Lee ,
Yun-Hee Lee ,
Jae-il Jang  and
Dongil Kwon
Ju-Young Kim
Affiliation:
School of Materials Science and Engineering, Seoul National University, Seoul 151-744, Korea
Jung-Jun Lee
Affiliation:
School of Materials Science and Engineering, Seoul National University, Seoul 151-744, Korea
Yun-Hee Lee
Affiliation:
Division of Metrology for Quality Life, Korea Research Institute of Standards and Science, Daejeon 305-340, Korea
Jae-il Jang*
Affiliation:
Division of Materials Science and Engineering, Hanyang University, Seoul 133-791, Korea
Dongil Kwon
Affiliation:
School of Materials Science and Engineering, Seoul National University, Seoul 151-744, Korea
*
a) Address all correspondence to this author. e-mail: jijang@hanyang.ac.kr
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Abstract

Since in instrumented indentation the contact area is indirectly measured from the contact depth, the natural and unavoidable roughness of real surfaces can induce some errors in determining the contact area and thus in calculating hardness and Young's modulus. To alleviate these possible errors and evaluate mechanical properties more precisely, here a simple contact model that takes into account the surface roughness is proposed. A series of instrumented indentations were made on W and Ni samples whose surface roughness is intentionally controlled, and the results are discussed in terms of the proposed model.

Keywords

Elastic propertiesHardnessStrength
Type
Rapid Communications
Information
Journal of Materials Research , Volume 21 , Issue 12 , December 2006 , pp. 2975 - 2978
Copyright
Copyright © Materials Research Society 2006

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References

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