Wear defined•Wear is damage involving progressive loss of material due to relative motion between a surface and a contacting substance.•There are four tribological systems: (tribology is the science of friction and wear): smooth solids sliding on smooth: solids; hard, sharp substances sliding on softer surfaces; surface fatigue caused by repeated stressing; and relative motion between fluids, possibly with suspended solids, and a solid surface.
Abrasion•Abrasion is the result of hard particles forced against a solid surface with relative motion. The types of abrasion listed in Fig. 9.1
Erosion•Erosion is the gradual loss of material from a solid surface due to relative motion or mechanical interaction between a fluid containing particulate and a solid. The various forms of erosion listed in Fig. 9.1
Adhesive Wear•Adhesion wear is the progressive loss of