| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing: Marine Materials and Structures
|
| Presentation Title |
Influence of Build Direction and Part Size on the Microstructure and Mechanical Properties of 3D Printed 316 Stainless Steel |
| Author(s) |
Chase Gesteland, Andrew Lewis, Randall Doles, David Boch, Donald Tezbir, Jonathan Ruffley, Grace X. Gu, Peter Hosemann |
| On-Site Speaker (Planned) |
Chase Gesteland |
| Abstract Scope |
3D printed stainless steel metamaterials exhibit unique mechanical properties like high crush efficiency, making them relevant in engineering applications experiencing extreme forces. In this work, various 316L Stainless Steel struts from custom lattice designs were printed using laser powder bed fusion (LPBF) to investigate the microstructural and mechanical effects of part size and build direction for machine-learning lattice structure design algorithms. Struts from 0.5 mm to 2.0 mm in diameter were printed at several angles. Using EBSD, SEM, and uniaxial tensile testing, it was found that varying diameters and build directions significantly affected grain size, ultimate tensile strength (UTS), and fracture stress. Digital image correlation (DIC) monitored in-situ deformation, revealing increased grain size and homogeneity with increasing build angle. Finer-grained struts printed horizontally showed higher UTS and lower fracture strain than larger-grained struts printed vertically, with values varying up to 200%. These findings support machine-learning informed design of metamaterial lattice structures. |
| Proceedings Inclusion? |
Planned: |