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Nanoindentation analysis as a two-dimensional tool for mapping the mechanical properties of complex surfaces

Published online by Cambridge University Press:  31 January 2011

Nicholas X. Randall ,
Matthieu Vandamme  and
Franz-Josef Ulm
Nicholas X. Randall*
Affiliation:
CSM Instruments, Needham, Massachusetts 02494
Matthieu Vandamme
Affiliation:
CSM Instruments, Needham, Massachusetts 02494
Franz-Josef Ulm
Affiliation:
Department of Civil and Environmental Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139
*
a) Address all correspondence to this author. e-mail: [email protected]
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Abstract

Instrumented indentation (referred to as nanoindentation at low loads and low depths) has now become established for the single point characterization of hardness and elastic modulus of both bulk and coated materials. This makes it a good technique for measuring mechanical properties of homogeneous materials. However, many composite materials are composed of material phases that cannot be examined in bulk form ex situ (e.g., carbides in a ferrous matrix, calcium silicate hydrates in cements, etc.). The requirement for in situ analysis and characterization of chemically complex phases obviates conventional mechanical testing of large specimens representative of these material components. This paper will focus on new developments in the way that nanoindentation can be used as a two-dimensional mapping tool for examining the properties of constituent phases independently of each other. This approach relies on large arrays of nanoindentations (known as grid indentation) and statistical analysis of the resulting data.

Keywords

Elastic propertiesHardnessNanoindentation
Type
Articles
Information
Journal of Materials Research , Volume 24 , Issue 3 , March 2009 , pp. 679 - 690
Copyright
Copyright © Materials Research Society 2009

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References

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