| About this Abstract |
| Meeting |
MS&T24: Materials Science & Technology
|
| Symposium
|
Additive Manufacturing: Microstructure, Defects, and Properties
|
| Presentation Title |
The Effect of Scan Rotation Angle and Build Orientation-Induced Mechanical Anisotropy in Additive Manufacturing 316L Stainless Steel |
| Author(s) |
Som Dixit, Shunyu Liu, Pauline Smith, Sai Aditya Pradeep |
| On-Site Speaker (Planned) |
Som Dixit |
| Abstract Scope |
The scan rotation angles and build orientations in the laser powder bed fusion (LPBF) process create unique microstructural features that induce mechanical anisotropy in 316L-stainless steel (SS). To thoroughly investigate their effects on anisotropy, 316L-SS samples were fabricated with scan rotation angles between adjacent layers (abbreviated as R) of R0 (0°), R45 (45°), R67 (67°), and R90 (90°), and built orientations in the XY plane ranging from XY0 to XY90 at intervals of 15°. Tensile results revealed that XY0-R67 samples had the highest yield strength (YS), ultimate tensile strength, and ductility, while XY0-R0 exhibited the lowest. XRD indicated that all the samples possessed a single-phase austenitic structure with varying dislocation densities. The dislocation density had the highest contribution to the YS of LPBF 316L-SS in the sequence of XY0-R67>XY0-R45>XY0-R90>XY0-R0. The crystallographic texture variations with rotation angles also had a secondary effect on the YS of the LPBF 316L-SS. |