An experimental Investigation of the validity of Miner’s Law for adhesive wear of coated surfaces under different loading conditions (increasing, decreasing, and random loading)
Coating is one of the processes used to improve the tribological properties of surfaces. In this article, the increase in useful lifetime of soft-coated part and the validity of Miner’s rule for predicting adhesive wear are investigated. In order to achieve this aim, a series of pin-on-disk experiments on three sets of disks were performed by single-force, two consecutive-forces and three-forces loading conditions, at two constant speed levels. These experiments were performed for simple, double-layer and four-layer coated disks. As a result, the validity of Miner’s rule for consecutive loads at a constant speed is shown. Also, the work done by friction force and wasted energy are investigated. It is shown that for each of the parts with a specified coating, regardless of loading sequence, the work done by friction force up to the failure point is almost a constant value.
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