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Deconvolution of hardness from data obtained from nanoindentation of rough surfaces

Published online by Cambridge University Press:  31 January 2011

M. S. Bobji  and
S. K. Biswas
M. S. Bobji
Affiliation:
Department of Mechanical Engineering, Indian Institute of Science, Bangalore, 560 012, India
S. K. Biswas*
Affiliation:
Department of Mechanical Engineering, Indian Institute of Science, Bangalore, 560 012, India
*
a)Address all correspondence to this author. e-mail: skbis@mecheng.iisc.ernet.in
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Abstract

Variation of hardness with penetration in nanoindentation of a rough surface is a compound effect of variation in asperity geometry with penetration, designated geometric effect, and genuine property gradients with depth as may exist in a near-surface zone. We simulate indentation of a rough surface numerically to elucidate the geometric effects and validate it by some model “macro” experiments. Finally, we formulate a general framework to deconvolute genuine property variation by normalizing the measured hardness with the geometric effect.

Type
Articles
Information
Journal of Materials Research , Volume 14 , Issue 6 , June 1999 , pp. 2259 - 2268
Copyright
Copyright © Materials Research Society 1999

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References

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