Authors:
Maxime Stephan (1), Guilhem Roux (1), Carine Ablitzer (2), Jean-Paul Garandet (1), Alexis Burr (1)
1- Univ. Grenoble Alpes, CEA, LITEN, DTNM, L3M, Grenoble 38000, France
2- CEA, DES, IRESNE, DEC, Cadarache, Saint-Paul-lez-Durance 13108, France
Abstract:
The powder spreadability partly drives the robustness of powder-bed-based additive manufacturing processes as well as material performances of the printed parts. The full comprehension of the mechanisms involved during powder spreading is therefore paramount. Literature showed that the impact of friction between the powder and previous layers is significant on powder bed quality. Thus, this work presents an experimental test bench that captures the heap profile during spreading in real time. Indeed, it is found that the heap profile and recoating angle are sensitive to the platform surface roughness and powder properties. Improving the interaction of the powder with the platform results in a larger recoating angle, and improves the powder bed density. This is done by increasing the friction through cleverly oriented ridges or by reducing powder rolling friction through sphericity. Our test bench is relevant for understanding powder deposition experimentally, and has interest for further spreadability optimizations.
DOI:
https://doi.org/10.59499/EP246276968
