Correcting for contact area changes in nanoindentation using surface acoustic waves
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Author(s)
Beck, Christian E.
Hofmann, Felix
Armstrong, David E.J.
Eliason, Jeffrey Kristian
Maznev, Alexei
Nelson, Keith Adam
Date Issued
October 2016
Journal
Scripta Materialia
Publisher
Elsevier
Citation
Beck, Christian E. et al. “Correcting for Contact Area Changes in Nanoindentation Using Surface Acoustic Waves.” Scripta Materialia 128 (February 2017): 83–86 © 2016 Acta Materialia Inc
Version
Final published version
Abstract
Nanoindentation is extensively used to quantify nano-scale mechanical behaviour. A widely-used assumption is that a well-defined, material-independent relationship exists between the indentation depth and indenter contact area. Here we demonstrate that this assumption is violated by ion-implanted tungsten, where pileup around the indenter tip leads to substantial changes in contact area. Using high accuracy surface acoustic wave measurements of elastic modulus, we are able to correct for this effect. Importantly we demonstrate that a priori knowledge of elastic properties can be readily used to compensate for pileup effects in nanoindentation without the need for any further measurements. Keywords: nanoindentation; pile-up; ion implantation; irradiation; surface acoustic waves
MIT Department
Massachusetts Institute of Technology. Department of Chemistry
Terms of Use
Creative Commons Attribution 4.0 International License
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1016/J.SCRIPTAMAT.2016.09.037
