On the size effect in abrasive and erosive wear

Abstract It is a familiar observation that the wear process in erosion and both two- and three-body abrasion of ductile metals becomes less efficient as the eroding or abrading particle size decreases below about 100 μm. At least a dozen explanations have been presented for this phenomenon, with most studies having been restricted to one type of wear. In the present work we present results for erosion and two-and three-body abrasion using a range of particle sizes, and we draw on the grinding and metal-cutting literature. It is concluded that the only explanation for the size effect which cannot be discounted is that shallow surface layers exhibit a higher flow stress than that of the bulk material when they are abraded or eroded.

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