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Time-Dependent Deformation in Room-Temperature Indentation Experiments using a Nanoindenter

Published online by Cambridge University Press:  22 February 2011

Shefford P. Baker ,
Troy W. Barbee Jr  and
William D. Nix
Shefford P. Baker
Affiliation:
Stanford University, Department of Materials Science and Engineering, Stanford, CA 94305
Troy W. Barbee Jr
Affiliation:
Lawrence Livermore National Laboratory, Livermore, CA 94550
William D. Nix
Affiliation:
Stanford University, Department of Materials Science and Engineering, Stanford, CA 94305
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Abstract

Time-dependent deformation in room-temperature indentation is a well known phenomenon which is frequently overlooked in depth-sensing indentation experiments. In this study, the time-dependent displacements which occur during depth-sensing indentation experiments using a Nanoindenter were investigated. Time-dependent displacements were found to result both from plastic deformation of the sample and experimental drift. A simple correction for experimental drift was applied in experiments on sputtered copper thin films and reasonable strain rate sensitivities were obtained. The sources of experimental drift were identified and measured. It appears to be possible to measure the rate-dependence of plastic deformation in a variety of materials using this instrument.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 239: Symposium D – Thin Films: Stresses and Mechanical Properties III , 1991 , 319
Copyright
Copyright © Materials Research Society 1992

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References

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