| Titre : | Influence of Rotational Speed on the Fabrication, Characterization, and Numerical Modeling of a Centrifugally Cast Al-Si/SiC Functionally Graded Material |
| Titre original : | Influence de la Vitesse de Rotation sur la Fabrication, la Caractérisation et la Modélisation Numérique d’un Matériau à Gradient Fonctionnel Al-Si/SiC Élaboré par Coulée Centrifuge |
| Auteurs : | Amina Djoudi, Auteur ; Ibtihal Temmar, Auteur ; Nadir Mesrati, Directeur de thèse |
| Type de document : | document électronique |
| Editeur : | [S.l.] : [s.n.], 2026 |
| Format : | 1 fichier PDF (1.5 Mo) / ill. |
| Note générale : |
Mémoire de Projet de Fin d’Études : Métallurgie. Génie des Matériaux : Alger, École Nationale Polytechnique : 2026
Bibliogr. p.107-111 |
| Langues : | Anglais |
| Index. décimale : | PL00926 |
| Tags : | functionally graded materials ; Al–Si/SiC composites vertical centrifugal casting rotational speed microhardness gradient tensile properties COMSOL Multiphysics grading laws+ |
| Résumé : |
This thesis studies the fabrication, characterization, and numerical modeling of centrifugally cast Al–Si/SiC functionally graded composites with a focus on the influence of rotational speed on the properties. Three specimens were produced at 800, 1000, and 1200 rpm with 2 wt% SiC reinforcement in a recycled automotive-piston Al–Si matrix. Mechanical characterisation
showed that the 1200 rpm specimen achieved the highest tensile strength (191.4 MPa) and the steepest radial hardness gradient (rim-to-core differential ≈80 HV), while the 1000 rpm specimen displayed anomalously uniform properties, confirmed along two independent diame-tral scans. Optical micrography showed SiC particles visually more concentrated near the core than the rim in the more strongly graded specimens, contrary to classical centrifugal-segregation expectations and tentatively attributed to inward displacement by the advancing solidification front. Finite element simulations in COMSOL Multiphysics using linear, power, and exponen-tial grading laws reproduced the experimental elastic response with high correlation across all configurations tested (R2 > 0.93); among these, the linear law at α = 1 was the uniquely consis-tent configuration, its area-weighted average modulus matching the experimentally calibrated homogeneous baseline exactly (R2 = 0.9987), while the power and exponential laws systemati-cally overestimated the elastic slope due to the high area-weighted SiC surface modulus. |
Exemplaires (1)
| Code-barres | Cote | Support | Localisation | Section | Disponibilité | Spécialité | Etat_Exemplaire | ||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| EP01107 | PL00926 | Ressources électroniques | Bibliothèque centrale | Projet Fin d'Etudes | Disponible | Génie_des_Matériaux | Téléchargeable |
