Nanoscale incipient asperity sliding and interface micro-slip assessed by the measurment of tangential contact stiffness

Experiments with a multidimensional nano-contact system have shown that, prior to kinetic frictional sliding, there is a significant reduction of the tangential contact stiffness relative to the elastic prediction. The reduction occurs at contact sizes below about 50-200 nm for aluminum single cryst...

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Bibliographic Details
Published inScripta materialia Vol. 55; no. 7
Main Authors Gao, Yanfei, Lucas, Barry N., Hay, Jack C., Oliver, Warren C., Pharr, George Mathews
Format Journal Article
LanguageEnglish
Published United States 01.01.2006
Subjects
ALUMINIUM
FLEXIBILITY
FORECASTING
KINETICS
MATERIALS SCIENCE
MONOCRYSTALS
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Summary:Experiments with a multidimensional nano-contact system have shown that, prior to kinetic frictional sliding, there is a significant reduction of the tangential contact stiffness relative to the elastic prediction. The reduction occurs at contact sizes below about 50-200 nm for aluminum single crystals and several other materials. Using a cohesive interface model, we find that this reduction corresponds to a transition from a small-scale-slip to large-scale-slip condition of the interface.
Bibliography:DE-AC05-00OR22725
USDOE Office of Science (SC)
ISSN:1359-6462
1872-8456
DOI:10.1016/j.scriptamat.2006.05.006