Evaluation of damping behaviour in wc co coated Aluminium metal matrix composites reinforced With rice husk ash

Abstract

The functionality of the material systems depend on vibrational energy. The loss of vibrational energy (refer to as damping) and degradation pose a threat to the efficient functioning of material systems. Of late researchers have started different ways to reduce vibrational losses and corrosion deterioration. Now more thrust is on developing modern materials which would tremendously enhance the dissipation of effective energy and corrosion resistance. One such development is Metal Matrix Composites (MMC) which has got high retention of phenomenal trades when compared to monolithic materials such as like elevated specific strengths, stiffness, toughness, energy dissipation, corrosion and wear resistance. newlineWith excellent mechanical properties like low density, machinability, durability, low weight-high strength ratio, exceptional corrosion abrasion and wear resistance, aluminium is predominantly used as metal matrix material for various applications. Researchers and industrialists stated that, among distinct reinforcements, rice husk ash (RHA) has gained lot of attraction compared to other discontinuous dispersoids because of its availability, low cost and low density. Among diverse fabrications techniques stir casting was considered as most preferable and least cost liquid fabrication technique. The present study utilizes stir casting technique to fabricate Al/RHA metal matrix composites with different compositions of RHA reinforcement i.e. 2, 4, and 6 wt. %. Properties like density, hardness, porosity, tensile strength of A356.2 base alloy and Al/RHA composites are investigated. newlinePlating s are extensively used for the enhancement of surface properties, but it has exhibited more adverse effect on environment and health issues because of emission of harmful gases in the plating technique. So, to overcome such situations modern techniques such as thermal spray process has been used extensively. Among the various newlinethermal spraying coating techniques, High velocity oxygen fuel (HVOF) spray process is the most feasible an