Frictional Properties of a Surface Covered With a Soft Metal Film—Part 1: Experiments on Friction Between a Single Protuberance and a Surface

[+] Author and Article Information
S. Kato, K. Yamaguchi

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

E. Marui

Department of Precision Engineering, Gifu University, Kakamigahara-shi, Gifu-ken 504, Japan

K. Tachi

Department of Mechanical Engineering, Toyama College of Technology, Hongo-cho, Toyama-shi 930, Japan

J. of Lubrication Tech 103(2), 236-242 (Apr 01, 1981) (7 pages) doi:10.1115/1.3251635 History: Received May 30, 1979; Online November 17, 2009


Frictional properties in the contact between a hard protuberance and a metal surface covered by a soft thin metal film are examined experimentally. The protuberance used in the experiment is a hard steel ball which simulates asperities on many engineering surfaces. The load dependency of the coefficient of friction and the effects of thickness and hardness of the film on the friction are clarified. The simple empirical expression of friction, which represents the effect of the film properties, is presented, considering the deformation mechanism of the surface film.

Copyright © 1981 by ASME
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