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Simplified Area Function for Sharp Indenter Tips in Depth-sensing Indentation

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Abstract

A two-parameter “area function” characterizing the depth-dependent projected area of an indenter was introduced and applied to a Berkovich tip. The two parameters have physical meaning, corresponding to the effective tip radius and effective cone angle. The indenter tip was calibrated on a commercial load-controlled Nano Indentert® XP (MTS Systems Corp., Eden Prairie, MN). All calibrations were carried out using the procedure of Oliver and Pharr [J. Mater. Res. 7, 1564 (1992)] using several homogeneous materials. Plane-strain modulus and hardness values deconvoluted from indentation load–displacement traces using the calibrated two-parameter area function compared well with the values determined using the empirical eight-parameter area function of Oliver and Pharr.

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Authors and Affiliations

  1. Department of Chemical Engineering and Materials Science, University of Minnesota, 55455, Minneapolis, Minnesota, USA

    Jeremy Thurn & Robert F. Cook

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  1. Jeremy Thurn
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  2. Robert F. Cook
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Thurn, J., Cook, R.F. Simplified Area Function for Sharp Indenter Tips in Depth-sensing Indentation. Journal of Materials Research 17, 1143–1146 (2002). https://doi.org/10.1557/JMR.2002.0169

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  • DOI: https://doi.org/10.1557/JMR.2002.0169

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