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Errors associated with depth-sensing microindentation tests

Published online by Cambridge University Press:  03 March 2011

J. Menčík
Affiliation:
CSIRO Division of Applied Physsics, Lindfield, New South Wales 2070, and University of Sydney, Department of Mechanical Engineering, Sydney, New South Wales 2006, Australia
M.V. Swain
Affiliation:
CSIRO Division of Applied Physsics, Lindfield, New South Wales 2070, and University of Sydney, Department of Mechanical Engineering, Sydney, New South Wales 2006, Australia
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Abstract

In the determination of mechanical properties by ultra-microindentation, various errors can appear. This paper analyzes various sources of errors in estimation of elastic modulus and hardness. These errors arise from uncertainties of the indenter geometry and properties, as well as measuring instrument limitations and errors, such as the minimum detectable load, compliance, and noise of the system. Other sources of errors are thermal drift, shape of the impression, and scatter of properties of the tested material. Characteristic features and the magnitude of individual kinds of errors are discussed, together with formulas and recommended methods for their reduction.

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Copyright
Copyright © Materials Research Society 1995

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