NUST Institutions Library Catalogue

This thesis explores the relationship between the positioning of components during 3D
printing and the resulting mechanical and microstructural characteristics of SS-316L
alloy, both in its untreated and heat-treated states. Specifically, the study focuses on
additive technology implemented at two distinct locations: the stitching line and the
center of the print bed using the FS421M additive metal melting system. The current
body of literature on the mechanical properties of SS-316L lacks sufficient research on
the linked effects of component placement and heat treatment. To address this gap, the
authors conducted a comprehensive investigation, presenting original findings. SS-316L
is commonly used in applications requiring exceptional resistance to corrosion and high
temperatures, and its reduced carbon content enhances resistance to inter-granular
corrosion. For evaluating the mechanical properties uniaxial tensile tests and Vickers
Hardness tests were conducted at the authors' university. Statistical analysis encompassed
factors such as print direction, heat treatment, stress relieving, ultimate tensile strength,
yield strength, and specified values. The fracture surfaces were scrutinized using scanning
electron microscopy and digital microscopy. The results demonstrate that mechanical
properties were affected by the orientation and placement of the samples on the print bed,
even when subjected to identical heat treatments. In conclusion, this research highlights
the interrelation between part placement in 3D printing and the resulting mechanical and
microstructural properties of SS-316L enabling improved practices in additive
manufacturing applications.