Frictional Properties of a Surface Covered With Soft Metal Surface Film (Surface Topography and Frictional Properties)

[+] Author and Article Information
Shinobu Kato

Department of Electronic-Mechanical Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464, Japan

Etsuo Marui

Department of Mechanical Engineering, Gifu University, 1-1 Yanagido, Gifu-shi 501-11, Japan

Kiyoo Tachi

Department of Mechanical Engineering, Toyama National College of Technology, Hongo-cho, Toyama-shi 939, Japan

J. Tribol 109(3), 545-551 (Jul 01, 1987) (7 pages) doi:10.1115/1.3261502 History: Received June 01, 1986; Online October 29, 2009


The friction between a real engineering surface composed of many micro-asperities and a surface covered with soft metal film is discussed. First, the frictional coefficient shows a remarkable load dependency, when a hard single protuberance with a small radius of curvature is slid on a soft metal surface. This load dependence originates from the ploughing effect induced by the cooperation of contact pressure and shearing resistance of the soft metal film deforming on the protuberance surface. Based on this result, the effect of the real engineering surface topography on the frictional properties is studied.

Copyright © 1987 by ASME
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