Abstract
Friction surfacing (FS) is a thermo-mechanical surface modification technique that can enhance the microstructure, mechanical, and tribological characteristics of a surface. The combined action of friction between the substrate and the consumable rod, as well as viscoplastic deformation in the coating and substrate materials, produces heat. FS was first restricted to the processing of soft materials such as aluminium and magnesium alloys. However, it is now gradually being introduced for hard materials and alloys also. Microstructural characteristics, tribological properties, mechanical properties and erosion-corrosion resistance are some of the processed surface qualities that can be enhanced with FS without affecting the basic material characteristics. According to the literatures, tool rotational speed, substrate travel speed, and axial force are significant process factors that affect the processed surface performance. The purpose of this paper is to examine and emphasize the different process parameter impacts on the resulting microstructural, mechanical, corrosion and tribological characteristics, as well as current challenges and future prospects in FS.
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