Microstructure and Mechanical Properties of Al-Mg-Si Hybrid Composites Reinforced with SiC/TiO2


Hanan K. Azeez, Dr.Israa Abd. Al.Kadir Aziz, Assistant Professor
Department of Metallurgy, Production Engineering and University of Technology, Baghdad, Iraq.


The current work aims to investigate the influence of adding different weight percents of TiO2 and SiC 1.5:0,3:0, 4.5:0, 0:1.5, 0:3, 0:4.5, 1.5:1.5, 3:3, 4.5:4.5 particulate reinforcement on mechanical and microstructure characters of base alloy Al-Mg-Si. The base alloy and composites as hybrid were set via method of stir casting. The mechanical characters of base alloy and composites as hybrid were detected by using hardness and tensile tests. The electron microscope as scanning (SEM) and spectroscopy of dispersive energy (EDS) were utilized for inspection of the topography of fracture surfaces. The results were showing that the strength of tensile as ultimate, strength of yield, and hardness,elevated with elevating the weight reinforcement percentage to 4.5% of TiO2/ SiC. In contrast, the rate of elongation is decreased. The optical microscope inspection represents that the particles distribution in the matrix is uniform without any voids. The X-Ray diffraction manifested the presence of different phases and inter metallic compounds Mg5Si6, Mg2Si, Al2O3, Mg6Si3.3., Al3Mg2 and Al3Ti.