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Time Dependent Deformation During Indentation Testing

Published online by Cambridge University Press:  15 February 2011

B. N. Lucas ,
W. C. Oliver ,
G. M. Pharr  and
J-L. Loubet
B. N. Lucas
Affiliation:
Nano Instruments, Inc., 1001 Larson Drive, Oak Ridge, TN 37830, [email protected]
W. C. Oliver
Affiliation:
Nano Instruments, Inc., 1001 Larson Drive, Oak Ridge, TN 37830, [email protected]
G. M. Pharr
Affiliation:
Rice University, Department of Materials Science, Houston, TX, 77005
J-L. Loubet
Affiliation:
Ecole Central de Lyon, LTDS, URA CNRS 855, BP 163, F-69131 Ecully Cedex, France
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Abstract

Constant loading rate/load indentation tests (1/P dP/dt) and constant rate of loading followed by constant load (CRL/Hold) indentation creep tests have been conducted on high purity electropolished indium. It is shown that for a material with a constant hardness as a function of depth, a constant (1/P dP/dt) load-time history results in a constant indentation strain rate (1/h dh/dt). The results of the two types of tests are discussed and compared to data in the literature for constant stress tensile tests. The results from the constant (1/P dP/dt) experiments appear to give the best correlation to steady-state uniaxial data.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 436: Symposium CC – Thin Films Stresses and Mechanical Properties VI , 1996 , 233
Copyright
Copyright © Materials Research Society 1997

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