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This study involves fabricating Ti based materials reinforced by carbon nano-tubes. CNTs were added with weight percentage (1, 2, 3, 4 and 5 wt% ) to enhance the mechanical properties of titanium. Some properties were measured for nanocomposites (CNTs/Titanium) such as microhardness, elastic modulus, wear rate in addition to microstructure by SEM. Microhardness was increased for nano-composites, which increased 421 Kg/mm2. The results of elastic modulus shown the decreasing in elastic modulus from 124 GPa to 82 GPa for nanocomposites. Wear rate results exhibited the lower wear rate of nano-composites compared with titanium due to the filling the vacancy in microstructure by CNTs. The scanning electron microscopy images showed that uniform distribution of CNTs in titanium and the lowest defect in microstructure. The good coherence between CNTs and base metal led to good mechanical properties.

In recent years, the demand of high-performance and light-weight materials was increasing for industrial applications. The present research aims to study microstructural and mechanical properties of aluminum matrix hybrid reinforced 6-12 wt.% of garnet under the effects of materials chill casting during the manufacturing aluminum matrix composite. In this research work, metallic mold and no chills were used. In order to evaluate the quality of the chill end casting microstructure, hardness, and tensile tests were conducted on the prepared composite specimens. Aluminum matrix composites underwent the chill casting process have been examined using the optical microscope, scanning electron microscopy and X-ray diffraction. Microstructure outcomes of the casted Al-composites alloy indicated that having precipitations (Al2Si, AlCuMg2Si) and Garnet particulates hard within the Al-matrix. The results showed that the copper chill casting is the better one in terms of improving the mechanical properties because of its high volumetric heat capacity. Aluminum composite with addition of 9% Garnet composite produced via copper chill casting exhibits better mechanical properties.

Differential scanning calorimetry (DSC) has been utilized to study behavior and analyze the compositions phases in the modified Aluminum matrix (AA 7075) alloy with complex quaternary of Zinc (Zn) (6.7wt. %), Magnesium (Mg) (2.8 wt. %), Copper (Cu) (1.8 wt. %), Nickel (Ni) (0.5 wt.%), with additive of Tin (Sn) (0.5 wt.%). The alloys were manufactured by casting process. The casted Aluminum-Zinc-Magnesium-Copper-Nickel-Tin alloy slabs were homogenized at the different temperatures. Firstly, under treatment of 450°C for 2 hours followed by treatment at 470°C for 1 day and then treated at 480°C for 40 minutes, then all the casted Al-7075 alloy samples have quenched in cold water after each step. The treated samples were underwent the artificial ageing at 120 °C for 1 day. The outcomes proved that the X-ray diffraction (XRD) analyses confirmed information of the DSC thermal analyses which were obtained through various heat treatments of the samples Al-Zn-Mg-Cu-Ni-Sn alloy. The outcomes have explained that Differential scanning calorimetry data could help in understanding the peaks of temperatures as well the enthalpy values for the forming and dissolution the equilibrium phase’s and compositions of precipitations within the artificial ageing were conducting for Al-Zn-Mg-Cu-Ni-Sn alloy samples.