Laser Powder Bed Fusion (LPBF), one of the most employed additive manufacturing techniques
for metals, has opened new dimensions in realizing strong and weight reducing structures. In this
study, Inconel 718 (IN718) unit cell designs, were fabricated through the LPBF technique and
analyzed. Among the plethora of lattice structures in existence, BCC, BCC-Z, FCC, FCC-Z,
Gyroid, Diamond and Schwarz structures have been selected to focus on. A relationship between
the mechanical properties including yield strength, failure stress and strain, and hardness with each
type of unit cell was established. Also, the effect of the possible defects on the hardness value was
examined using microstructural analysis on samples. Scanning Electron Microscopy (SEM)
analysis was also performed to examine the possible defects and its effect on the hardness of the
as-built part. The SEM images of the grain structures indicated higher levels of isotropy in Gyroid,
and Diamond samples compared to the rest of the samples which relates to the load bearing
capacities of each unit cell structure. A similar trend was observed in terms of the uniformity of
meltpool which can be linked with the consistency in yield characteristics. Further, Diamond and
BCC-Z structures displayed high values of hardness in comparison with rest of the samples.Mechanical Engineerin