About this Abstract |
Meeting |
2022 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2022)
|
Symposium
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2022 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2022)
|
Presentation Title |
Printability Studies of 316L Stainless Steel by Paste Deposition Modeling |
Author(s) |
Miguel Hoffmann, Alaa Elwany |
On-Site Speaker (Planned) |
Miguel Hoffmann |
Abstract Scope |
Indirect metal additive manufacturing (AM) processes that employ metal-polymer composites to 3D print ‘green’ parts offer an economical and user-friendly alternative to melt-based AM. Leveraging knowledge in powder metallurgy permits functional parts with predictable microstructures and properties to be manufactured; however, the large fractions of binder introduce the need for specialized debinding procedures that significantly prolong manufacturing time and can negatively impact mechanical properties and geometrical capabilities.
We introduce paste deposition modeling, an AM process for making 316L stainless steel parts using a high solid loading (90.1 wt %) paste with just 3.5 vol % binder. Response surface methodology experiments were conducted to study the effects of process parameters on green density and surface roughness. Multi-objective optimization enabled printing parts with 4.67 g/cc green density and 21.54 um surface roughness. Thermal studies were conducted to investigate ideal debinding and sintering conditions. Microstructures were analyzed through optical and scanning electron microscopy. |
Proceedings Inclusion? |
Definite: Post-meeting proceedings |