Abstract

Pressure-shear plate impact experiments are conducted to study the kinetics of friction on a submicrosecond time scale. The configuration offers the simplicity of allowing the interpretation of the experimental results by using the framework of one-dimensional plane wave analysis. To address the problem of high-speed machining, one of the impacting plates is chosen to correspond to a wear-resistant grade of tungsten-carbide tool material and the other to a commercial-grade titanium alloy (Ti-6Al-4V). The interfacial conditions are varied from sticking to slipping by varying the angle of impact and/or the surface roughness. Also, within a single experiment, transitions from conditions of fully sticking to intermittent, to full sliding are introduced by subjecting the interface to step changes in normal pressure. The experimentally obtained time-resolved frictional response of the interface is used to examine the role of the interfacial normal pressure, slip velocity, slip distance, and surface roughness in governing the interfacial slip resistance. Presented at the 52nd Annual Meeting In Kansas City, Missouri May 18–22, 1997

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