Thesis defence by Selma Leonardi

Doctorante de l'équipe COMMET,
sous la direction de Anne-Laure HELBERT et le co-encadrement de Gabriella Tarantino

LPBF manufacturing of Random Porous AlSi10Mg : relation process - structure - mechanical properties

Architected materials are lightweight materials with engineered structures that optimize properties while minimizing density and material consumption. Their complex structure can reach the microscale.
The manufacturing of such materials has been booming thanks to additive manufacturing (AM) techniques, which allow for 3D printing in a layer-by-layer fashion.
This thesis investigates the Laser Powder Bed Fusion process, an AM technique that employs a laser and metallic powder, to manufacture non-periodic architected materials from AlSi10Mg. These materials could find applications in fields such as transportation and energy.
Throughout this work, the impact of the manufacturing process on the properties of these materials has been investigated and compared to the original design predictions. It has been demonstrated that the process influences the structure of the materials from the microscale to the structural scale, which in turn affects their mechanical performance.

Composition du jury :

Laurence BODELOT, Professeure, LMS, École polytechnique (Rapporteur)
Joël ALEXIS Professeur des Universités, LGP, École Nationale d’Ingénieurs de Tarbes (Rapporteur)
Louise TOUALBI Ingénieure de recherche, ONERA (Examinatrice)
Pierre LHUISSIER Chargé de Recherches CNRS, SIMaP-GPM2, Grenoble INP (Examinateur)
Éric HUG Professeur des Universités, CRISMAT, Université de Caen Normandie (Examinateur)
Patrice PEYRE, Directeur de Recherche CNRS, PIMM ENSAM Paris (Membre invité)