Friction Joining-Based Additive Manufacturing Techniques
Friction-based additive techniques are the solution to the numerous inherent limitations accompanying commercially prevalent fusion-based techniques. Out of seven FATs, two additive manufacturing methods based on friction welding, that is, rotary FW and linear FW, are covered in detail in this chapter. Both these processes are similar in principle, as in both techniques, addition of sequential layers takes place via the friction-welding route. In RFW, joining of parts takes place by rotating one part against a stationary part and then applying frictional force to consolidate the joint. In LFW, joining of two parts takes place by utilizing the oscillatory motion of one part with respect to another stationary part and then consolidating the joint. These techniques have the ability to produce 3D components with properties either equivalent to or better than the base metal. In this chapter, the basics and principles of additive manufacturing via these techniques are discussed.