Breakdown of Rolling and Sliding Tribological Contacts

Dear Colleagues,

The breakdown or failure of a tribological conjunction might manifest itself as either an unacceptable increase in the level of rolling or sliding friction or an unequally unacceptable rise in the damage to the loaded surfaces, resulting in enhanced volumes of wear. Such failures may be classified as scuffing, scoring, or, if sufficiently severe, galling. The aim of the tribologist is invariably to specify materials, component dimensions and system operating conditions that will maximize device life and should preferably allow the operator to predict, or even engineer, the way that some known, and perhaps sacrificial, component will move towards a specified and chosen failure criterion. In order to do this with any confidence, as well as the mechanisms that allow satifactory operation to be possible, those that describe the degradation of the key elements of the system must be both appreciated and understood.

The aim of the contributions to this volume will be to bring together some of our understanding of the way in which load bearing tribological situations can move from a regime of satisfactory operation to one of incipient failure either by the sum of incremental changes in the physical or chemical properties of the materials involved or in their operating environment.

Prof. Dr. John A. Williams
Prof. Dr. Huirong Le
Guest Editors

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• scuffing
• scoring
• galling
• lubrication failure