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The influence of indenter tip rounding on the indentation size effect

Record type: Article

A model was developed to interpret the indentation size effect. The model considers the tip wear effect, causing a rounded tip, the plastic zone size and various strengthening contributions, including geometrically necessary dislocations, preexisting statistically stored dislocations and grain size. It is shown that the shape of the worn tip can be effectively determined through calibration experiments. The model is applied to predict dislocation densities, and shows a good correspondence with published data on dislocation densities in copper single crystals. Predicted ISE is shown to be in good correspondence with published data on a range of metals, and an improvement over existing models is demonstrated.

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Citation

Qiao, Xiaoguang, Starink, Marco J. and Gao, Nong (2010) The influence of indenter tip rounding on the indentation size effect Acta Materialia, 58, (10), pp. 3690-3700. (doi:10.1016/j.actamat.2010.03.004).

More information

Published date: June 2010
Keywords: ultra fine-grained (ufg) aluminium, nanoindentation, geometrically necessary dislocations, tip rounding effect, hardness, ssd, gnd, rounded indenter
Organisations: Engineering Mats & Surface Engineerg Gp

Identifiers

Local EPrints ID: 69745
URI: http://eprints.soton.ac.uk/id/eprint/69745
ISSN: 1359-6454
PURE UUID: d4884351-73c9-4a25-8ba2-a35d7422aa1c

Catalogue record

Date deposited: 02 Dec 2009
Last modified: 19 Jul 2017 00:06

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Contributors

Author: Xiaoguang Qiao
Author: Nong Gao

University divisions

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