ABSTRACT
This chapter focuses on welding-based additive manufacturing (WAM) that is the core of metal additive manufacturing. The path planning is primarily being able to produce sensible paths automatically for depositing various geometries with minimum residual stress and distortion. The overhanging features cannot always be avoided but can be minimized only by selecting an appropriate orientation. The development of power source technology played a significant role in the realization of WAM, particularly in the case of the arc-based deposition method. In-situ rolling controls the deposition layer thickness and improves the deposition efficiency. The rolling load and roller size determines the optimum distance between the heat source and the roller. The optimum distance is in the range of 20–25mm for micro roller during in-situ rolling. The rolling increases the layer width but decreases the layer height, distortion, and residual stress considerably with an increase of rolling load.
