|About this Abstract
||MS&T21: Materials Science & Technology
||Additive Manufacturing Modeling and Simulation: Microstructure, Mechanics, and Process
||Process Maps and Models For Highly Filled Polymers In Powder Fused Filament Fabrication (PF3) 3D Printing
||Kameswara Pavan Kuma Ajjarapu, Roshan Mishra, Ji-Hae Kim, Kunal Kate
|On-Site Speaker (Planned)
||Kameswara Pavan Kuma Ajjarapu
Powder fused filament fabrication (PF3) 3D printing utilizes powder-filled polymer filaments, while combining Fused filament fabrication (FFF) and sintering processes to fabricate complex metallic and ceramic structures. As PF3 filaments tend to have >85 wt.% powder content within them, they often exhibit low filament strength and flow instabilities that result in print failures. In this work, unfilled filaments and highly filled (90wt.%) filaments were printed via PF3 at different extrusion temperatures and print speeds in order to model the rheology, flow rate and mechanical properties required to print parts with a relative density >90%. Additionally, for the same printed parts, process maps were generated to identify viscosity and shear rate regions. Further, rheological, thermal and mechanical characterization was performed to identify how material properties of the filaments affect printability. It is expected that such a process model will facilitate identification of optimum print parameters for a given material system.