Etude de la densification des pièces métalliques faites à partir de la FDM

Details

Supervisors

Simar, Aude ; Herman, Benoît

Faculty

Ecole polytechnique de Louvain

Degree label

Master [120] : ingénieur civil mécanicien

Abstract

enThe additive manufacturing of material by Fused deposition modeling (FDM), previously used to produce polymer parts, has recently used to manufacture metallic and ceramic parts from filaments made of metallic or ceramic powders. Combined with debinding and sintering operations, this process offers a less expensive alternative to other known additive metal manufacturing processes. However, the density obtained from FDM full parts is not always satisfactory and this contributes to the reduction of the final density after sintering. Various printing parameters have been explored in this work.In order to obtain the optimal set of printing parameters that can lead to the realisation of a perfectly dense part after printing in FDM on a pro2 plus 3D Raise Printer. Two filaments were used for this purpose : PLA and ultrafuse 316L filaments made of 90% by mass of 316L stainless steel powder. Using Archimede’s method, we were able to determine the density of the parts obtained using PLA and ultrafuse 316L. It appears a clear improvement of the density with the optimal parameters. We obtained a relative density of 100% for the PLA and 90% for the Ultrafuse 316L. A scanning electron microscope image analysis of the steel parts after sintering helped us to determine the areas of porosity in the material and an estimation of the porosity due to sintering was made.