Experimental investigations on mechanical properties of multi-layered structure fabricated by GMAW-based WAAM of SS316L

In the present study, Gas metal arc welding (GMAW) based Wire-arc additive manufacturing (WAAM) process was used to fabricate a multi-layered structure at optimized parameters on SS316L using wire of SS316L. The structure's microstructure, macrostructure, and mechanical properties (tensile test, impact microhardness, fractography) were examined three locations top, middle, bottom sides structure. Macrostructure different zones has confirmed an appropriate bonding between two layers, complete fusion without oxidation, free from defects unwanted geometries. Microstructure results have observed colony columnar dendrites in zone, coarser grains with vertical growth along residual ferrite middle dendritic skeletal shape top zone. Results all tensile for zone developed by WAAM fall range values wrought SS 316 L. microhardness shown consistent behavior across built zones. obtained average value test better strength than commercially fractured fracture specimens revealed many dimples, which suggests good ductility as-built Thus, that GMAW-based matches standards industrial applications.