The Wear Coefficient—Magnitude, Scatter, Uses

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Abstract
One of the key factors in the analysis of a wear problem is the computation of the wear coefficient for a comparison with the value to be anticipated for this application. Typical values of adhesive wear coefficients for a variety of materials and lubricants are presented, and the values compared with those arising in the wear modes of abrasion, corrosion and fretting. A major uncertainty arises from the fact that wear coefficients show considerable variation, both in repeat testing, and in the testing of different materials that presumably should have the same wear coefficient. Quantitative values for the scatter encountered in adhesive wear situations are given and discussed. Various uses of the wear coefficient in the analysis of sliding systems are illustrated.

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