There has been considerable interest recently in a simple abrasive wear test which is often called the 'micro-scale abrasion test' or 'ball-cratering' method. A sphere rotates under a fixed load against the surface of the specimen in the presence of a slurry of abrasive particles, and a wear scar in the shape of a spherical cap is progressively formed in the surface. In order for the test to yield useful results, the test conditions must be closely controlled and the data provided from the test must be analysed in appropriate ways. Significant advances in both these aspects have been made over the past five years and are reviewed in this paper.
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