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

被引：29

作者：

Gao, Y. F. ^{[1
]}

Lucas, B. N.

Hay, J. C.

Oliver, W. C.

Pharr, G. M.

机构：

[1] Univ Tennessee, Dept Mat Sci & Engn, Knoxville, TN 37996 USA

[2] Oak Ridge Natl Lab, Div Math & Comp Sci, Oak Ridge, TN 37831 USA

[3] Fast Forward Devices LLC, Knoxville, TN 37931 USA

[4] MTS Syst Corp, Nano Instruments Innovat Ctr, Oak Ridge, TN 37830 USA

[5] Oak Ridge Natl Lab, Div Met & Ceram, Oak Ridge, TN 37831 USA

来源：

SCRIPTA MATERIALIA | 2006年 / 55卷 / 07期

关键词：

nanoindentation; micromechanical model; interface micro-slip;

D O I：

10.1016/j.scriptamat.2006.05.006

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

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. (c) 2006 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：653 / 656

页数：4

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