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Characterization of the mechanical behavior of wear surfaces on single crystal nickel by nanomechanical techniques

Published online by Cambridge University Press:  31 January 2011

M.J. Cordill ,
N.R. Moody ,
S.V. Prasad ,
J.R. Michael  and
W.W. Gerberich
M.J. Cordill*
Affiliation:
Erich Schmid Institute, Austrian Academy of Sciences, Leoben 8700, Austria; and University of Minnesota, Chemical Engineering and Materials Science, Minneapolis, Minnesota 55455
N.R. Moody*
Affiliation:
Sandia National Laboratories, Livermore, California 94551-0969
S.V. Prasad
Affiliation:
Erich Schmid Institute, Austrian Academy of Sciences, Leoben 8700, Austria; and University of Minnesota, Chemical Engineering and Materials Science, Minneapolis, Minnesota 55455
J.R. Michael
Affiliation:
Sandia National Laboratories, Albuquerque, New Mexico 18185
W.W. Gerberich
Affiliation:
Erich Schmid Institute, Austrian Academy of Sciences, Leoben 8700, Austria; and University of Minnesota, Chemical Engineering and Materials Science, Minneapolis, Minnesota 55455 University of Minnesota, Chemical Engineering and Materials Science, Minneapolis, Minnesota 55455
*
a) Address all correspondence to this author. e-mail: [email protected]
b) This author was an editor of this focus issue during the review and decision stage. For the JMR policy on review and publication of manuscripts authored by editors, please refer to http://www.mrs.org/jmr_policy
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Abstract

In ductile metals, sliding contact induces plastic deformation resulting in subsurfaces, the mechanical properties of which are different from those of the bulk. This article describes a novel combination of nanomechanical test methods and analysis techniques to evaluate the mechanical behavior of the subsurfaces generated underneath a wear surface. In this methodology, nanoscratch techniques were first used to generate wear patterns as a function of load and number of cycles using a Hysitron TriboIndenter. Measurements were made on a (001) single crystal plane along two crystallographic directions, <001> and <011>. Nanoindentation was then used to measure mechanical properties in each wear pattern. The results on the (001) single crystal nickel plane showed that there was a strong increase in hardness with increasing applied load that was accompanied by a change in surface deformation. The amount of deformation underneath the wear patterns was examined from focused ion beam cross-sections of the wear patterns.

Keywords

HardnessNanoindentationTribology
Type
Articles
Information
Journal of Materials Research , Volume 24 , Issue 3 , March 2009 , pp. 844 - 852
Copyright
Copyright © Materials Research Society 2009

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