Abstract Scope |
Control the grain structure and process-related defects during fusion based additive manufacturing is nowadays fundamental. The development of process variants based on wire and arc additive manufacturing (WAAM) is required to further expand the potential of this technology. In the presentation, recent developments on WAAM will be presented, namely hot forging WAAM and in-situ inoculation. For the former, the intend is to performed viscoplastic deformation during the process to induce recrystallization and break the columnar structures that are easily formed. For the later, the goal is to provide nucleation points that can generate smaller grain size in the fabricated parts, while controlling the inoculants dissolution to modify the solidification path. This work will combine process development, microstructure and mechanical characterization, as well as simulation efforts. |