The influence of indenter tip rounding on the indentation size effect

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


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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.

Item Type: Article
Digital Object Identifier (DOI): doi:10.1016/j.actamat.2010.03.004
ISSNs: 1359-6454 (print)
Keywords: ultra fine-grained (ufg) aluminium, nanoindentation, geometrically necessary dislocations, tip rounding effect, hardness, ssd, gnd, rounded indenter
Subjects: Q Science > QC Physics
T Technology > TJ Mechanical engineering and machinery
T Technology > TN Mining engineering. Metallurgy
Divisions : University Structure - Pre August 2011 > School of Engineering Sciences > Engineering Materials & Surface Engineering
ePrint ID: 69745
Accepted Date and Publication Date:
June 2010Published
Date Deposited: 02 Dec 2009
Last Modified: 31 Mar 2016 12:58

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