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RESEARCH PAPERS

Durability of Graphite Films in Plastic Deformation

[+] Author and Article Information
J. A. Schey, A. H. Lonn

Department of Materials Engineering, University of Illinois at Chicago Circle, Chicago, Ill.

J. of Lubrication Tech 97(2), 289-294 (Apr 01, 1975) (6 pages) doi:10.1115/1.3452577 History: Received March 05, 1974; Online October 18, 2010

Abstract

The ability of solid lubricant (graphite) films to withstand repeated contact with a deforming cold or hot aluminum workpiece was investigated by three techniques. Ring compression very readily indicated the gradual wear of the film, but sliding at the interface was limited and tendencies to tool pick-up did not show up. Plane strain compression was much more useful in this respect; changes in the edge-profile of the compressed zone proved to be a sensitive indicator of friction, obviating the need for force measurements. Twist compression imposed the most severe conditions. In all instances, a sandblasted tool surface provided better lubricant retention than a polished one.

Copyright © 1975 by ASME
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