Authors:
Lucia Garcia de la Cruz (Universidad Carlos III de Madrid, Spain)
Gabriel Caballero (Universidad Carlos III de Madrid, Spain)
José Manuel Torralba (Universidad Carlos III de Madrid; IMDEA Materials Institute, Spain)
Robin Kromer (I2M, Université de Bordeaux, Arts et Métiers, CNRS, France)
Mónica Campos (Universidad Carlos III de Madrid, Spain)
Abstract:
Powder selection to manufacture metallic materials via Material Extrusion Additive Manufacture (MEX) highly affects the ability to process the designed parts, where criteria such as availability or price, are considered. However, powder properties have a major impact in the stages of MEX. In this study, two 316L stainless steel powders with different granulometry were selected (d50 of 12 and 33 mm with Sw of 3.14 and 5.95 respectively), to assess the influence of particle size and PSD on feedstock performance in g-MEX. Feedstock with 55 (vol.)% solid loading was prepared and characterized through rheological oscillatory testing to analyze the effect of temperature and frequency in its fluid-like behavior. The two feedstocks were then evaluated in terms of extrudability, investigating the ability to extrude continuously and the particle size distribution in the strand. Additionally, debinding and sintering were carried out to evaluate the effect of granulometry on the final part.
DOI:
https://doi.org/10.59499/EP256768017
