**3.1 Parent plate material**

The section of substrate material is so important in WAAM because the wettability of deposited weld beads to build the component solely depends upon the chemical composition of the substrate material over which the weld beads are deposited. If the case is of dissimilar metal, then laying the weld bead onto the dissimilar substrate is very difficult one to consider. Moreover, weld dilution of the first layer of the deposit must also be analyzed for this case. The stiffness and thickness of the substrate material will offer enough resistance to weld distortion. Therefore, a detailed study of substrate material used during the fabrication of metal components is much important.
