Microstructure and mechanical properties of wire arc additive manufactured bi-metallic structure

Wire arc additive manufacturing (WAAM) with better material utilisation efficiency and higher deposition rate was employed to fabricate bi-metallic structure (BMS) of non-stabilised austenitic stainless steel (SS904L), and solid solution strengthened Hastelloy C-276. The micrographs confirmed the existence of directionally elongated, columnar, and equi-axed dendrites in the BMS. Significant grain coarsening was observed in the re-melted layers....