Materials for Controlling the Wear
Apart from the surface roughness and wear conditions, the properties of material of the component in consideration affect the wear and friction behavior appreciably. Surface properties of component including mechanical properties (hardness, fracture toughness, fatigue resistance), stacking fault energy, thermal stability at high temperature, and affinity with atmospheric gases control the operational wear mechanism and wear rate. Effect of microstructure on wear and friction behavior has been discussed. A range of ferrous materials (alloy steel, cast iron, stainless steel) and non-ferrous metals such as nickel and cobalt base alloys used for various wear resistant applications has been described. Concept of functionally graded materials (FGM) and thermal barrier coating (TBC) materials has also been presented.