Comparative analysis of cold and warm rolling on tensile properties and microstructure of additive manufactured Inconel 718

Despite the high efficiency and low cost of wire + arc additive manufacture (WAAM), epitaxial grown columnar dendrites WAAM deposited Inconel 718 cause inferior properties severe anisotropy compared to wrought components. Fundamental studies on influence one-pass cold warm rolling hardness microstructure were investigated. Then interpass tensile also analyzed. The results show that increases displays a heterogeneous distribution as-deposited material, exhibits larger deeper strain rolling. gradually change cell under process then equiaxed grains with subsequent new layer deposition. average grain size is 16.8 ?m 23.5 for rolling, respectively. strongly textured preferred < 001 > orientation transform random after process. refinement contributes dispersive distributed strengthening phases increase in its fraction heat treatment. samples superior cast material but components, while warm-rolled material. Isotropic are obtained treatment both decrease elongation lead transgranular ductile fracture mode. Finally, rolling-induced mechanism was discussed.