S&T PDI 19 Fetni Seifallah

Process Models of 316L+WC composite coating by Laser Cladding and of AlSi10Mg parts by selective laser melting to link their final properties with their manufacturing process.

 

This project is part of the common activities of Mechanics of Solid (MSM) and Metallic Materials Science (MMS) teams. Special attention is here given to laser cladding and selective laser melting (SLM) processes, applied to produce metals parts for advanced applications such as medical and aerospace in AlSi10Mg, Ti-6Al-4V, 316L alloys. My post doc will develop a 3D thermo-mechanical Finite Element (FE) model of 316L+WC Composite coatings by Laser Cladding. Investigating the links process parameter-temperature and stress history- microstructure with such a macroscopic FE model will enhance part quality. At lower scale, the microstructure evolution and mechanical properties of AlSi10Mg alloy in different zones (melt pool boundaries, Heat affected zone, core of melt pool) will be predicted via the phase-field approach. This work is a numerical contribution to reinforce the results generated by ongoing PhD: J. Delahaye (Effect of SLM process parameters and thermal post treatments on the nucleation and growth of Si precipitate, experimental work + bases of Phase Field model) and T. Maurizi Enrici (Fabrication and improvement of 316L+WC composite coatings processed by Laser Cladding experimental work). The innovation consists in the strong coupling experiment-simulation in order to enhance dialogue between numerical and experimental teams. Here my background allows an optimal dialog with both of them.