Authors:
Juan Alfonso Naranjo (UCLM, Spain),
Cristina Berges (UCLM, Spain),
Javier Hidalgo (UCLM, Spain),
Gemma Herranz (UCLM, Spain)
Abstract:
Fused filament fabrication is emerging as a promising sinter-based technology rivalling widespread beam-based approaches for the production of metal components. In the first step, a filament composed of a polymeric matrix with a high powder loading is extruded by a capillary die and deposited layer by layer to produce the desired geometry. Filament properties are critical for the printing performance, still, there is not a consensus on the range of filament properties adequate for printing. This work aims to establish threshold values for filament features leading to satisfactory printing by analysing the rheology and mechanical properties of filaments made of powders of diverse ferrous alloys. It is concluded that besides other consequences, filament rheology and mechanical properties have a strong impact on the shear stresses developed during printing, which limit the printing speed. These parameters can be engineered by solid loading and temperature to maximize the printing process.
DOI:
https://doi.org/10.59499/WP225372277