Microstructure characterization of recycled IN718 powder and resulting laser clad material
TypeArticles dans des revues avec comité de lecture
The possibility to reuse the metal powder wasted in Laser Material Deposition (LMD) process has been evaluated and a simple procedure developed. LMD uses metal powder which is fed through a nozzle into the focal point of a laser, where it melts the powder and the substrate material. During the process, a high ratio of particles hits against an unmelted area and directly bounces off the deposited area. The efficiency ratio of deposition can drop to 40% depending on the configuration and spot size. This work deals with the design of a procedure to recollect and reuse the wasted powder of a nickel based superalloy IN718. After usage, powder is recollected, undesired fractions are magnetically segregated and aggregates are removed by sieving. The particles are mixed again and ready for reuse. In order to study the effectiveness of the process, no new powder has been added to the recovered fraction, and this procedure has been repeated five times. Experimental tests show that deposited material present similar properties than those obtained with new powder grains. But, after 3 reuses, the porosity content increases consequently and the rupture strain decreases strongly. The implementation of this process allows the improvement of the final efficiency, reducing costs and decreasing the hazardous powder amount.
Cette publication figure dans le(s) laboratoire(s) suivant(s)
Visualiser des documents liés par titre, auteur, créateur et sujet.
GIROT, Franck; DAU, Frédéric; GUTIERREZ-ORRANTIA, Esther (ELSEVIER, 2016)Drilling of composite material structure is a widely used process in aeronautical assembly due to itsbest manufacturing value (ratio quality/cost). However, delamination which can be generated at the holeexit is still a ...
GIROT, Franck; DAU, Frédéric; GUTIERREZ-ORRANTIA, Esther (Elsevier BV, 2017)Drilling of composite material structure is a widely used process in aeronautical assembly due to its best manufacturing value (ratio quality/cost). However, delamination which can be generated at the hole exit is still a ...
TCHEIN, Gnofam Jacques; JACQUIN, Dimitri; ALDANONDO, Egoitz; COUPARD, Dominique; GUTIERREZ-ORRANTIA, Esther; GIROT MATA, Franck; LACOSTE, Eric (Elsevier BV, 2019)Hot deformation behavior of the Ti-6Al-4V alloy is studied through hot torsion tests. Cylindrical samples are twisted at different strain rates and temperatures in the β phase domain. The recorded torque vs twisting angle ...
MOREL, Franck; GUERCHAIS, Raphaël; SAINTIER, Nicolas (Italian Group of Fracture, 2015)This study aims at providing a better understanding of the effects of both microstructure and defect on the high cycle fatigue behavior of metallic alloys using finite element simulations of polycrystalline aggregates. It ...
ROBERT, Camille; HOR, Anis; MOREL, Franck; SAINTIER, Nicolas; PALIN-LUC, Thierry (2013)An analysis of high cycle fatigue behavior is done via the numerical simulation of polycrystalline aggregates. Different metallic materials with a FCC crystalline structure, but different cubic elastic coefficients, are ...