MICRO-IMPACT CRACKING OF TRIBOLOGICAL COATINGS
Journal Title: Tribologia - Year 2015, Vol 262, Issue 4
Abstract
The stress field in the coating/substrate system causes combined effects on both the coating and substrate materials due to cyclic loads. The consequence is the initiation and propagation of fatigue cracks leading to a loss of materials. A theoretical means of the analysis of the stress field in these systems is the modified Hertz theory, which is used to determine the depth of the point of maximum stress concentration and the contact radius of coating/substrate system in contact with the ball. The analytically contact radius of the coating/substrate system in contact with a ball was determined and experimentally verified. For the purposes of design and the proper operation of tools and machine parts with coatings, the points of maximum contact stress concentration were estimated. The analysis of the theoretical fatigue process of coating/substrate systems was verified in the experimental research.
Authors and Affiliations
Wiesław RAKOWSKI, Paweł ADAMCZYK, Sławomir ZIMOWSKI
Keywords
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