Industrial innovation is growing very rapidly over recent years and consequently there is an increasing demand for new propelled materials. Aluminum metal matrix composites containing with nano sized reinforcement materials are capable of meeting the needs of new engineering applications. They are broadly used in the automobile, aerospace construction and manufacturing industries. The addition of hard ceramic nano-sized particles can improve the base material in terms of mechanical strength, wear resistance and fracture toughness. In the current work Al6063 alloy composite containing different weight percentages of B4C nanoparticles from 0 to 6wt% in steps of 2 were successfully fabricated by using Ultrasonic-Cavitation assisted casting process. The microstructural study of the nanocomposites was performed using a scanning electron microscope; the microstructural study showed that B4C nanoparticles were uniformly distributed in the matrix alloy, EDS confirming the presence of boron and carbon components. it was observed that the properties such as hardness, ultimate tensile strength and yield strength were significantly improved and percentage elongation decreased with the rise of the B4C Nanoparticles. Fractographic Studies on the fracture surface of the tensile specimens was performed with Scanning Electron Microscope (SEM ) to understand the mechanisms of failure involved in these composites.

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