| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Powder Materials Processing and Fundamental Understanding
|
| Presentation Title |
Analytical Models for Initial and Intermediate Stages of Sintering of Stainless Steel Manufactured by Binder Jetting |
| Author(s) |
Alberto Cabo Rios, Eugene Olevsky, Eduard Hryha, Mats Persson |
| On-Site Speaker (Planned) |
Alberto Cabo Rios |
| Abstract Scope |
The initial green porous structure created by the binder jetting printing is characterized by its high porosity (40–50%). Thus, initial and intermediate sintering stages progress within a large porosity range, where a complex combination of diffusion mechanisms drives the sintering behavior. In the continuum mechanics-based isotropic pressure-less sintering models, densification kinetics is driven by the balance between the effective sintering stress and bulk viscosity. In this study, different normalized bulk moduli expressions, inspired by Skorohod, Hsueh, and Abouaf sintering models, are used in the framework of the continuum theory of sintering. The material viscosity and bulk moduli are successfully obtained from dilatometry and grain size experiments. The bulk moduli proposed contain physical parameters, which depend on the interparticle stress distribution or/and the initial high reactivity of the BJ compacts. The results of modeling are compared with the experimental results on the sintering of binder jetted 316L stainless steel powder components. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Modeling and Simulation, Other |