Grease Lubrication in Fretting

[+] Author and Article Information
Z. R. Zhou

Département Matériaux-Mécanique Physique, IFOS, UMR5621, Ecole Centrale de Lyon, 69131 Ecully, France; Tribology Laboratory, Southwest Jiaotong University, 610031 Chengdu, People’s Repubiic of China

Ph. Kapsa

Laboratoire de Tribologie et Dynannique des Syst̀mes, UMR 5513 Ecole Centrale de Lyon, 69131 Ecully, France

L. Vincent

Département Matériaux-Mécanique Physique, IFOS, UMR 5621, Ecole Centrale de Lyon, 69131 Ecully, France

J. Tribol 120(4), 737-743 (Oct 01, 1998) (7 pages) doi:10.1115/1.2833773 History: Received December 03, 1996; Revised December 23, 1997; Online January 24, 2008


This paper concerns an experimental investigation of fretting behavior using grease lubrication for ball (ball bearing steel) -flat (low alloyed steel) contact. The influences of the imposed displacement amplitude, contact geometry, pressure, and frequency are emphasized. In order to better understand the effect of grease lubrication at the interface, a glass counterface was used to visualize the contact; sliding tests were used to identify the effect of a large displacement amplitude. Dynamic loading analysis, in combination with subsequent metallographic examinations, have shown that fretting damage depends strongly upon fretting conditions and upon grease durability. Lubrication conditions and palliative effect in fretting are discussed. Results have shown an important effect of normal force, displacement amplitude, and frequency of motion on the lubricating effect of grease. The separation of grease into two phases in the contact during friction, creating bubbles, appears to be an important phenomenon.

Copyright © 1998 by The American Society of Mechanical Engineers
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