| About this Abstract |
| Meeting |
2022 TMS Annual Meeting & Exhibition
|
| Symposium
|
Powder Materials Processing and Fundamental Understanding
|
| Presentation Title |
Sintering Anisotropy of Binder Jetting 316L |
| Author(s) |
Alberto Cabo Rios, Eduard Hryha, Eugene Olevsky, Peter Harlin |
| On-Site Speaker (Planned) |
Alberto Cabo Rios |
| Abstract Scope |
The main objective of this study was to characterize the multiaxial sintering behavior of 316L stainless steel components manufactured using Binder Jetting (BJ). This was done by investigating how the orientation of the part related to the BJ building directions influence the sintering behavior. 316L stainless steel cubic samples (10x10x10 mm3) were manufactured using binder jetting printer (56.2% green density), then debinded and pre-sintered before dilatometry tests (57.4% pre-sintered density). Dimensional variation during sintering occurring along the three orthogonal axes of the cubes was studied using dilatometry. Results showed anisotropic shrinkage behavior during sintering with larger shrinkages along the building direction. Also, the microstructure evolution (secondary phases, grain size and porosity) was studied using light optical microscope-based image analysis and electron backscatter diffraction (EBSD). Enhanced shrinkage behavior was observed after ~1340°C that was correlated to the presence of δ-ferrite above this temperature, causing enhanced solid-state diffusion in the δ-ferrite. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Powder Materials, Other |