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Mechanical Wear Fundamentals and Testing

Mechanical Wear Fundamentals and Testing

It has been a decade since the first edition of this book was published. During that period important changes in the field of tribology have occurred. As a consultant I have also gained additional tribological experience in a wide range of industrial applications. It was thus decided to develop a second edition with the goal of incorporating this new information and additional experience into a more useful and current book, as well as clarifying and enhancing the original material. While doing this, the purpose and perspective of the first edition were to be maintained, namely, ‘‘to provide a general understanding . . . for the practicing engineer and designer . . . engineering perspective . . . ’’. As rewriting progressed it became clear that the greatly expanded text would develop into a much larger volume that the first. We therefore decided to divide the material into two volumes, while keeping the basic format and style. Essentially the first two parts of the original edition on the fundamentals of wear and wear testing are combined into

a single volume, Mechanical Wear Fundamentals and Testing. The remaining two parts of the first edition, which focus on design approaches to wear and the resolution of wear problems, are the basis for a second volume, Engineering Design for Wear: Second  Edition, Revised and Expanded.

While a good deal of background material is the same as in the first edition, significant changes have been made. The most pervasive is the use of a new way of classifying wear mechanisms, which I have found to be useful in formulating approaches to industrial wear situations. As a result, Part A, Fundamentals, has been reorganized and rewritten to accommodate this new classification and to include additional material on wear mechanisms. The treatment of thermal and oxidative wear processes has been expanded, as well as the consideration of galling and fretting. The treatment of frictional heating is also expanded. A section on wear maps has been introduced. Additional wear tests are described in Part B, Testing, which has been expanded to include friction tests.

The last two parts of the first edition are discussed in Engineering Design for Wear. Additional appendixes have been added, providing further information for use in engineering situations. These new appendixes include tables on threshold stress for galling and sliding wear relationships for different contact situations. A glossary of wear mechanisms has also been added.

These books demonstrates the feasibility of designing for wear and using analytical approaches to describe wear in engineering situations, which has been my experience over the last 40 years.

Raymond G. Bayer



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