Concluding remarks

The physical parameters affecting the friction welding mainly include rotational speed, forging load, welding materials, surface and interface conditions of the substrate material. The speed of rotation affects the intermetallic layer thickness such that a low speed of rotation results in less intermetallic layer thickness. The dissimilar friction welds are tolerant to variations of speed and arrest time as compared to other welding techniques. Nevertheless, the proper selection of the operating parameters of friction welding and prior preparation of the surfaces can minimize the defect sites, which can occur in the weld section. In the present chapter, the brief description of the importance and findings of the friction welding process and resulting weld characteristics are presented.