| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Powder Materials Processing and Fundamental Understanding
|
| Presentation Title |
Keeping Dimensional and Geometrical Precision of Holes in 316L Parts Produced by Metal Binder Jetting – Study of the Influence of Size and Inclination |
| Author(s) |
Marco Zago, Marco Mariani, Nora Lecis, Ilaria Cristofolini |
| On-Site Speaker (Planned) |
Marco Zago |
| Abstract Scope |
Binder jetting (BJ) additive manufacturing is highly promising for industrial applications, but achieving dimensional and geometrical precision is challenging. This study investigates dimensional changes and geometrical accuracy of cylindrical holes, differing for size and axis inclination, in five AISI 316L parts fabricated by BJ. The parts were measured in green and sintered state, and resulting dimensional changes were compared to those predicted by an analytical model accounting for anisotropic dimensional change, showing satisfactory agreement. The observed discrepancies were attributed to inhomogeneous part shrinkage, and to gravity-induced load acting during sintering. The influence of inclination was also studied on flat surfaces in the part; the observed form error was ascribed to sintering distortion, and to the influence of saturation level and layer shifting. These findings emphasize the importance of properly controlling both printing and sintering process parameters to design high-quality BJ products with precise dimensions and geometry. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Process Technology, Other |