ABSTRACT
This chapter presents the work done using different material systems in developing surface coatings by friction surfacing. Steels are the most widely used substrates and coating materials to develop surface coatings by friction surfacing. Friction surfacing has been used to develop various surface coatings of aluminum alloys. The microstructure was appeared as very fine in the coating compared with the base microstructure. Margam Chandrasekaran et al., produced different surface coatings on steel and aluminum substrate to investigate the feasibility of friction surfacing to develop solid-state coatings. Materials with lower hardness were developed surface coatings on both mild steel and, aluminum substrate at lower pressures. R. Sekharbabu et al., developed D2 steel on low carbon steel and grain refined coating was observed due to dynamic recrystallization which increased the surface hardness and wear resistance by promoting martensitic transformation and refining the primary carbides. Improved wear properties for the composite coatings were obtained compared with base aluminum alloy.
