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

Megan J. Cordill, N. R. Moody, S. V. Prasad, J. R. Michael, W. W. Gerberich

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

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.

Original languageEnglish (US)
Pages (from-to)844-852
Number of pages9
JournalJournal of Materials Research
Volume24
Issue number3
DOIs
StatePublished - Mar 2009

Bibliographical note

Funding Information:
Sandia is a multiprogram laboratory operated by Sandia Corporation, a Lockheed Martin Company for the United States Department of Energy’s National Nuclear Security Administration under Contract DE-AC04-94AL85000. M.J.C. and W.W.G. acknowledge the support from the National Science Foundation through Grants DMI 0103169 and CMS-0322436.

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