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The frictional component of the indentation size effect in low load microhardness testing

Published online by Cambridge University Press:  31 January 2011

H. Li ,
A. Ghosh ,
Y.H. Han  and
R.C. Bradt
H. Li
Affiliation:
Mackay School of Mines, University of Nevada, Reno, Nevada 89557-0136
A. Ghosh
Affiliation:
Mackay School of Mines, University of Nevada, Reno, Nevada 89557-0136
Y.H. Han
Affiliation:
Mackay School of Mines, University of Nevada, Reno, Nevada 89557-0136
R.C. Bradt
Affiliation:
Mackay School of Mines, University of Nevada, Reno, Nevada 89557-0136
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Abstract

The role of friction between the microhardness indenter and the test specimen is addressed through the analysis of dry (unlubricated) and lubricated tests on iron by Atkinson and Shi. Quantitative evaluation through a proportional specimen resistance model accurately describes the results. It suggests that friction is a major portion of the observed hardness increase at low test loads, the indentation size effect. The ISE is related to the surface-area-to-volume ratio of the indentation, which is inversely related to the indentation dimension.

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Type
Articles
Information
Journal of Materials Research , Volume 8 , Issue 5 , May 1993 , pp. 1028 - 1032
Copyright
Copyright © Materials Research Society 1993

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