Fabrication of Al-6061/SiC Nano Composite Material Through Ultrasonic Cavitation Technique and Its Analysis

A material with high strength and low weight plays a vital role in aerospace and automotive industries.Aluminium metal matrix composite is one such material which is mainly produced using stir casting technique.However, the improper control of process parameters such as stirring time, feeding techniques, temperature control of this technique can lead to Porosity and Agglomeration in the composite.The above problems are well addressed by carrying out the innovative ultrasonic cavitation technique with the usage of stepped ultrasonic horn, cooling system and furnace processor.Introduction of ultrasonic wave in the liquid stage molten metal helps better mixing of Nano Silicon carbide (SiC) powder in the composite material of liquid state.In addition to the above, the ultrasonic wave induces the formation of newer grains thereby reduces the grain size of metal matrix.Moreover, it will significantly improve the strength, hardness and wear resistance.The molten aluminium 6061is reinforced with 0.3 to 1.5 volume % of Nano SiC particles and its uniform dispersion is confirmed with the steady increment in Brinell hardness value from 58 to 101 after each loading of SiC.The mechanical properties such as tensile strength, ductility and hardness are investigated and the distribution of particles were estimated by scanning electron microscope.