Wire arc additive manufacturing of AA5183 with TiC nanoparticles

Abstract Aluminium alloys processed by wire arc additive manufacturing (WAAM) exhibit a relatively coarse microstructure with columnar morphology. A powerful measure to refine the and enhance mechanical properties is promote grain refinement during solidification. Addition of ceramic nanoparticles has shown great potential as refiner strengthening phase in aluminium alloys. Thus, an Al-Mg alloy mixed TiC was manufactured novel metal screw extrusion method subsequently deposited WAAM. Measures restrict oxidation magnesium were examined. Purging CO 2 gas into chamber resulted remarkable reduction formation MgO Mg(OH) . decomposed Al 3 Ti WAAM deposition, leading significant 93% compared commercial benchmark. The presence remaining accounted for increased hardness material through thermal expansion mismatch Orowan strengthening. Exposure moisture air internal hydrogen content significantly, highly porous structure seen after deposition.