| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing: Process-induced Microstructures and Defects
|
| Presentation Title |
Investigating Build Orientation-induced Mechanical Anisotropy in Additive Manufacturing 316L Stainless Steel |
| Author(s) |
Som Dixit, Shunyu Liu, Heather A. Murdoch, Pauline M. Smith |
| On-Site Speaker (Planned) |
Som Dixit |
| Abstract Scope |
The influence of build orientation – one critical additive manufacturing parameter – on microstructural difference and mechanical anisotropy in as-built metallic components is not fully understood. To leverage the existing research on microstructure and anisotropy between Z and X/Y build orientations, this work focuses on process-structure-property characterization within 2D planes. Therefore, tensile coupons of 316L stainless steel were fabricated in five different build orientations (X, Y, XY45°, Z, and ZX45°) using laser powder bed fusion. Different characterization techniques at various length scales were employed to investigate the mechanisms of mechanical anisotropy. The tensile results of all samples showed higher yield strength and comparable ductility with those in the literature. Among all the build orientations, XY45° coupons presented the highest yield strength of 723 MPa while Z samples had the highest ductility of 49.6%. The dominant mechanisms associated with mechanical anisotropy were crystallographic orientation and dislocation density, followed by grain morphology. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Characterization, Mechanical Properties |