The possible role of nano sized precipitates on the mechanical properties of additively manufactured IN 718 superalloy

In the present study, three dimensional parts of Inconel 718® (IN 718) superalloy were fabricated using laser powder bed fusion (L-PBF) additive manufacturing (AM). The soundness as-built was checked by measuring relative density Archimedes method. Tensile tests carried out at strain rate 4.6 × 10-3 s-1 ambient temperature on cylindrical samples extracted from large size 3D blocks AM IN 718. also employing same test parameters wrought counterpart 718 (W so as to compare their mechanical properties. exhibited about 15% increase in 0.2% yield strength (0.2%YS) compared W Microstructures and characterized electron back scattered diffraction. dislocation substructure pre-deformed examined transmission microscope (TEM). Bright field TEM images revealed nano-sized precipitates carbides marginal 0.2%YS is attributed impediment movements high initial density.