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.
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Cordill, M.J., Moody, N.R., Prasad, S.V. et al. Characterization of the mechanical behavior of wear surfaces on single crystal nickel by nanomechanical techniques. Journal of Materials Research 24, 844–852 (2009). https://doi.org/10.1557/jmr.2009.0075
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DOI: https://doi.org/10.1557/jmr.2009.0075