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New relationship between Young's modulus and nonideally sharp indentation parameters

Published online by Cambridge University Press:  03 March 2011

Dejun Ma ,
Chung Wo Ong  and
Sing Fai Wong
Dejun Ma
Affiliation:
Surface Engineering Research Institute, Chinese Mechanical Engineering Society, Beijing 100072, People’s Republic of China
Chung Wo Ong*
Affiliation:
Department of Applied Physics and Materials Research Center, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, People’s Republic of China
Sing Fai Wong
Affiliation:
Department of Applied Physics and Materials Research Center, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, People’s Republic of China
*
a) Address all correspondence to this author. e-mail: apacwong@inet.polyu.edu.hk
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Abstract

Both analysis and numerical calculations have been carried out to investigate the relationship between Young’s modulus and nonideally sharp indentation parameters. The results confirm that there exists an approximate one-to-one correspondence between the ratio of nominal hardness/reduced Young’s modulus (Hn/Er) and the ratio of elastic work/total work (We/W) for any definite bluntness ratio (Δh/hm) of a nonideally sharp indenter. Based on this relationship, the Young’s modulus of the indented material can be determined just from the values of Hn, We, and W, which are directly measurable quantities in an indentation test.

Keywords

Elastic propertiesIndentationHardness

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Type
Articles
Information
Journal of Materials Research , Volume 19 , Issue 7 , July 2004 , pp. 2144 - 2151
Copyright
Copyright © Materials Research Society 2004

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