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Alternative technique for analyzing instrumented indentation data

Published online by Cambridge University Press:  31 January 2011

W. C. Oliver
W. C. Oliver
Affiliation:
Nano Instrument Innovation Center of MTS Systems Corporation, Oak Ridge, Tennessee 37830
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Abstract

A new analysis technique for calculating the hardness, modulus, and contact area from indentation data obtained using pyramidal or conical indenters was formulated and compared with another commonly used technique. Experimental data using a Berkovich indenter to indent fused silica and tungsten were examined. In addition, finite element modeling results were used to examine the effectiveness of the analytical techniques when a wide range of materials properties was considered. The new technique relies on the slope of the loading curve rather than the indenter displacement as an input. It is shown that the new technique is far less affected by the deviation of the geometry of the indenter from its intended shape. This effect removes the necessity to have detailed descriptions of the precise tip geometry in some cases. The new technique does not reduce errors associated with pile up of material near the indenter.

Type
Articles
Information
Journal of Materials Research , Volume 16 , Issue 11 , November 2001 , pp. 3202 - 3206
Copyright
Copyright © Materials Research Society 2001

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References

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