About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
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| Symposium
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Advancing the Frontier of Powder Materials Processing and Sintering: A MPMD/EPD Symposium in Honor of Eugene Olevsky
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| Presentation Title |
ncreasing strength properties in sinter-based additive manufacturing of SS316L via metal material jetting of sub-micron powders |
| Author(s) |
Jerard Gordon |
| On-Site Speaker (Planned) |
Jerard Gordon |
| Abstract Scope |
Metal Binder Jetting (MBJ) is a scalable additive manufacturing (AM) technique for metals but suffers from limited mechanical performance. This study investigates a drop-on-demand Metal Material Jetting (MMJ) process using sub-micron stainless steel 316L (SS316L) powders to overcome these limitations. MMJ samples were characterized via dilatometry, mechanical testing, and microstructural analysis, and compared with MBJ counterparts. MMJ produced significantly refined microstructures (average grain size: 2.4 μm), resulting in improved yield (312 ± 84 MPa) and ultimate tensile strengths (640 ± 38 MPa), surpassing reported MBJ values. This strength enhancement was driven by Hall-Petch strengthening and suppressed grain growth, despite a moderate reduction in ductility (15.5 ± 4.8%). A pressure-less viscous sintering model showed MMJ achieved over 3× higher sintering stress and ~31% lower grain growth than MBJ. These results demonstrate the potential of MMJ for high-performance, sinter-based metal AM and underscore the importance of powder size and sintering behavior in tailoring final properties. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Powder Materials, Iron and Steel |