Fabrication and Study of the Mechanical Properties of AA2024 Alloy Reinforced with B4C Nano-particles using Ultrasonic cavitation method

Abstract

Metal matrix nanocomposites (MMNCs) with the addition of nano-sized ceramic particles can be of significance for automobile, aerospace and numerous other applications. The physical and mechanical characteristics of the light refractory carbides such as SiC, TiC and B 4 C make them suitable for being used as reinforcement in aluminium base metal matrix composites This paper presents a technique for an inexpensive fabrication of bulk lightweight MMNCs with reproducible microstructures and superior properties by use of ultrasonic nonlinear effects, namely transient cavitation and acoustic streaming; to achieve uniform dispersion of nano-sized B 4 C particles in molten aluminum alloy. Nano-sized B 4 C p enhanced properties of aluminium matrix composites, with 1.5%wt of B 4 C. As compared to the base metal alloy, the mechanical properties including tensile strength and yield strength of the nanocomposites were improved significantly, while the ductility of base metal alloy matrix castings was retained. Micro structural study was carried out with an optical microscope and SEM which validates a good dispersion of nano-sized B 4 C p in metal matrix. Mechanical properties of the as-cast MMNCs have been improved significantly even with a low weight fraction of nanosized B 4 C.

Ultrasonication Assisted Fabrication of Aluminum and Magnesium Matrix Nanocomposites - A Review

“…The hardness of the Al MMNCs improved considerably by the addition of B4Cp particles into it. The ultimate tensile strength, yield strength are raised with the rise of B4Cp content [16].…”

Development and Characterization of Nanoparticle Metal Matrix Composites: (Al 2024-SiC NP)

“…The dispersion of SiC into Al matrix is constrained due to more %age of Si. It is noted that viscosity of the molten metal increases because of the addition of nano SiC particles [17]. MMC is produced using Stir Casting by selecting metal matrix of required grade and the dispersion of the reinforcement material.…”