| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing: Alternative Processes (Beyond the Beam)
|
| Presentation Title |
The Effect of Sintering Condition on the Microstructure Evolution of Binder-jet Printed IN625 Alloy |
| Author(s) |
Amir Mostafaei, Chuyuan Zheng, Pierangeli Rodriguez, Ian Nettleship, Markus Chmielus |
| On-Site Speaker (Planned) |
Chuyuan Zheng |
| Abstract Scope |
Binder-jet 3D printing (BJ3DP) of IN625 provides a greater degree of freedom in shaping than traditional manufacturing. However, remnant porosity in sintered material is damaging to properties such as fatigue strength. It is assumed that the remnant pore population is determined by the initial defects introduced by BJ3DP and the inability of pressureless sintering to remove them. A quantitative study including the evolution in pore size distribution and pore shape during supersolidus sintering and subsolidus sintering was performed on gas-atomized IN625 samples printed with three different particle size distributions (PSD). The results showed that large pore sections were preferentially eliminated at short times during supersolidus sintering but not subsolidus sintering. This was attributed to viscous particle rearrangement. In addition, micro-CT of the as-printed green bodies was used to visualize the pore network in 3D and demonstrated that the packing defects introduced by printing can be controlled by tuning the PSD. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |