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

Journal Article · Sat Nov 01 04:00:00 EDT 2008 · Proposed for publication in the Journal of Materials Research.

OSTI ID:966252

Michael, Joseph Richard ^[1]; Cordill, Megan J ^[2]; Prasad, Somuri V ^[1]; Gerberich, William W ^[3]; Moody, Neville Reid

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1. Sandia National Laboratories, Albuquerque, NM
2. Erich Schmid Institute, Leoben, Austria
3. University of Minnesota, Minneapolis, MN

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.

• Research Organization: Sandia National Laboratories
• Sponsoring Organization: USDOE
• DOE Contract Number: AC04-94AL85000
• OSTI ID: 966252
• Report Number(s): SAND2008-7520J
• Journal Information: Proposed for publication in the Journal of Materials Research., Journal Name: Proposed for publication in the Journal of Materials Research.
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
DEFORMATION
HARDNESS
MECHANICAL TESTS
MINIATURIZATION
MONOCRYSTALS
NICKEL
SURFACE PROPERTIES
WEAR RESISTANCE