Determination of the true projected contact area by in situ indentation testing

Guillonneau G, Wheeler JM, Wehrs J, Philippe L, Baral P, Höppel HW, Göken M, Michler J (2019)

Publication Type: Journal article

Publication year: 2019

Journal

Journal of Materials Research Cambridge University Press

Book Volume: 34

Pages Range: 2859-2868

Journal Issue: 16

DOI: 10.1557/jmr.2019.236

Abstract

A major limitation in nanoindentation analysis techniques is the inability to accurately quantify pile-up/sink-in around indentations. In this work, the contact area during indentation is determined simultaneously using both contact mechanical models and direct in situ observation in the scanning electron microscope. The pile-up around indentations in materials with low H/E ratios (nanocrystalline nickel and ultrafine-grained aluminum) and the sink-in around a material with a high H/E ratio (fused silica) were quantified and compared to existing indentation analyses. The in situ projected contact area measured by scanning Eelectron Mmicroscopy using a cube-corner tip differs significantly from the classical models for materials with low H/E modulus ratio. Using a Berkovich tip, the in situ contact area is in good agreement with the contact model suggested by Loubet et al. for materials with low H/E ratio and in good agreement with the Oliver and Pharr model for materials with high H/E ratio.

Authors with CRIS profile

Heinz Werner Höppel Lehrstuhl für Werkstoffwissenschaften (Allgemeine Werkstoffeigenschaften) Mathias Göken Lehrstuhl für Werkstoffwissenschaften (Allgemeine Werkstoffeigenschaften)

Additional Organisation(s)

Lehrstuhl für Werkstoffwissenschaften (Allgemeine Werkstoffeigenschaften)

Involved external institutions

Eidgenössische Materialprüfungs- und Forschungsanstalt (Empa) / Swiss Federal Laboratories for Materials Science & Technology CH Switzerland (CH) Université Claude Bernard Lyon 1 (UCB) FR France (FR)

How to cite

APA:

Guillonneau, G., Wheeler, J.M., Wehrs, J., Philippe, L., Baral, P., Höppel, H.W.,... Michler, J. (2019). Determination of the true projected contact area by in situ indentation testing. Journal of Materials Research, 34(16), 2859-2868. https://doi.org/10.1557/jmr.2019.236

MLA:

Guillonneau, Gaylord, et al. "Determination of the true projected contact area by in situ indentation testing." Journal of Materials Research 34.16 (2019): 2859-2868.

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