Nowadays, there is an ever-increasing demand for lightweight, robust, and low-cost materials. The desire for increasingly exotic and superior materials has become unavoidable as science progresses. The manufacturing industry is looking for more complex geometries. For example, composite materials are a sort of innovative material that blends the properties of its constituent materials. One of the most extensively used composite materials is metal matrix composites. Aluminium matrix composites are lightweight, high-performance structural and functional materials used in a variety of industries, including defense, aerospace, automotive, heating systems, and sports and entertainment. It is really good for the environment to use by-products from agricultural sectors, such as rice husk, as reinforcement with MMCs. The purpose of this research is to use powder metallurgy technology to build an aluminum-based composite with rice husk ash (RHA) and evaluate how its properties may be enhanced. Whereas metal casting can be used to fabricate composites, powder metallurgy is more cost-effective because it allows for the production of parts that are closer to net shape, and castings cool slowly from the liquid state, causing workability concerns as well as other restrictions such as segregation limitations. Good microstructure in the finished product is possible to obtain as powder particles are small and homogenous, resulting in improved mechanical properties. The experiment was conducted using an L27 orthogonal array with four different input parameters from prior studies: composition (wt.% of RHA), compaction pressure (CP), sintering temperatures (STE), and sintering time (ST). On the aluminium based composite, several mechanical tests, such as density and hardness, as well as tribological testing, such as the wear test, were conducted, with each test yielding noteworthy results. To satisfy the industry's needs, a comparison study was conducted.

With the enhancement in science and technology, necessity of complex shapes in manufacturing industries becomes essential for more versatile applications. These lead to demand for light weight and durable materials for applications in aerospace, defence, automotive, as well as sports and thermal management. Due to its high-tech structural, functional applications like defence, automobile, aerospace, thermal sensitive materials. Al-Matrix composites are considered as one of those classes of advanced engineering materials. In the present study, Al-RHA (Rice Husk Ash) composites are prepared by powder metallurgy route using 10% and 15% RHA by weight as reinforcement. Presence of abrasive particles leads to difficulty of conventional machining on Al-RHA composites hence non-conventional machining WEDM (Wire-Electric Discharge Machining) has been investigated. Suitable machining parameters for composites using wire EDM have been tried to get maximum material removal rate and speed. Optimizations of experimental parameters have been studied using Taguchi and Anova to standardize the process parameters for machining. Prime process parameters like servo-voltage, pulse-on time and pulse-off-time have been taken into consideration to study cutting quality of Al-RHA Metal matrix Composite using cutting speed as response parameters while effect of RHA weight fraction addition is also considered for evaluation to understand its influence on affecting the response.

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Metal matrix composite materials are a novel material generation capable of handling the implementation of advanced technology's growing needs. Aluminium-based metal matrix composites are widely used in automobiles and aerospace, as well as other industries, including defence and marine systems, due to their relatively low processing costs as compared to other matrices such as magnesium, copper, titanium, and zinc. Ceramic particles were shown to improve mechanical properties like hardness and tensile strength. The product's compactness and price, however, were both boosted. Agricultural waste materials are widely available today in significant amounts, and researchers have focused on using wastes as reinforcing fillers in composites to counteract pollution. Rice husk ash added to an aluminium alloy matrix increases the composite's mechanical properties while also increasing its wear resistance. According to scanning electron micrographs of the composite, the ash from rice husks is evenly distributed all over the aluminium matrix. Wear can vary from micro-cutting to oxidation at high temperatures in an aluminium alloy. Strain fields are produced and composite material wear resistance is improved due to the difference in coefficients of thermal expansion between the matrix and reinforcing materials. This study focuses on the production process, properties, and performance of an aluminium alloy composite incorporating rice husk ash, which has high hardness as well as wear resistance.

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