Projet GEOCAM: GEOmetrical Control of part produced by metal Additive Manufacturing
G-SCOP – UGA Institut de Mécanique et d’Ingénierie de Bordeaux – ENSAM
Context and Objective
The new technical possibilities offered by the Additive Manufacturing process (AM) of metallic materials set the stage for designing and manufacturing new parts with complex and innovative shapes. At this stage of the process development, it is hard to guaranty the quality of part (ie. material health, roughness, geometric defects).
The project focuses on the control of the overall geometry quality of the workpiece manufactured by SLM (Selective Laser Melting) and Electron Beam Melting (EBM) processes. This investigation field corresponds to the major originality of this project since the classical research activities deals with micrometric or macrometric scales of defects. The geometrical distortions are mainly due to the coupling between the thermal gradients imposed during manufacture and the shape evolution during the cooling phase and the successive layer deposits generating important residual stress states. The characteristics of the materials, the relative location of the part into the FA machine (close to the walls), the characteristics of the powders and the laser paths are all technological parameters that drastically modify the physical and thermomechanical phenomena involved.
Project leaders: Fréderic Vignat et François Villeneuve