Raymond J. Bayer 
Mechanical Wear Fundamentals and Testing, Revised and Expanded [PDF ebook] 

Written by a tribological expert with more than thirty years of experience in the field, this second edition compiles an extensive range of graphs, tables, micrographs, and drawings to illustrate wear, friction, and lubrication behavior in modern engineering applications. This volume promotes a clear understanding of wear testing methodologies for avoidance and resolution of deterioration and weakening in specific engineering designs. This comprehensive new edition describes more than 20 different phenomenological and over 10 operational wear tests and introduces a methodology devised by the author for selecting, developing, and conducting wear tests for specific applications.