Within this contribution, the transfer of knowledge from conventional fusion and deposition welding using electric arc processes to advanced direct energy deposition (DED) of multi-material structures in additive manufacturing will be presented. Gas metal arc and plasma welding have been used for decades to produce either joints or metallic deposits with desired properties. Also creating certain shapes by depositing weld metal in a layer-wise manner is known for approximately 100 years. With the rise of additive manufacturing, conventional arc welding processes have been extensively used to “print” 3-dimensional parts. The possibility of additively manufacturing multi-material parts or transition parts is of particular interest, as this has the potential to create load-efficient structures or even new alloys within the AM process.
Within this presentation, Wire Arc Additive Manufacturing (WAAM) and 3D Plasma Metal Deposition (3DPMD) for the manufacturing of multi-material and transition parts will be discussed. The experience with various alloys from carbon steels, high-alloyed steels and titanium- and nickel-based alloys will be presented.