Metal matrix composites, in particular, Aluminium Hybrid Composites are gaining increasing attention for applications in air and land because of their superior strength to weight ratio, density and high temperature resistance. This paper presents the results of experimental investigation on machinability properties of Silicon Carbide and Boron Carbide reinforced Aluminium 356 hybrid metal matrix composite. The composites were prepared by varying weight fraction of SiC (5%, 10%, 15%) and keeping the Boron Carbide weight fraction (5%) is constant using modified stir casting technique. Four layer coated carbide insert (TiN. Al2O3, TICN, TiN) designated as CNMG 120408 FR was used to machine the fabricated composites. Face centered central composite experimental design coupled with Response Surface Methodology (RSM) was used for modeling that the process output characteristics that influence by weight fraction, speed, feed rate, cutting depth. The experimental results imply that surface Roughness criteria are found to increase with increase of feed. At 0.206.mm/rev feed, the Surface Roughness deteriorated rapidly. Roughness decreases at higher cutting speed during machining. With the help of Mintab software, RSM showed an accuracy of 95%. Moreover, a good agreement was observed between the experimental and the predicted values of surface roughness and cutting force. Optimal cutting condition which leading to the minimum surface roughness and cutting force were highlighted

Metal additive manufacturing (AM) has matured and grown from its infancy in the research stage to the fabrication of new and advanced components for its supreme applications. AM is a lead for the advanced manufacturing processes with an increased and advanced potential to revolutionize the manufacturing domain. It could exhibit a progressive change in the project and design paradigms. In the past decade, the use of metal AM process in the aerospace industry to build, repair various components for military applications and several outer space vehicle fabrications have occupied higher potential among various other manufacturing industries. In addition to it, many studies have made it a more versatile, common, and safer technology for the design and fabrication of components with the introduction of novel processes, materials, technologies, cost efficiency, and process design. In the present review article, the use of advanced aluminum alloys in the AM of fuselage, horizontal stabilizer, and high and low wings has gained increased advantages in the aerospace industry. Various components of wings and fuselage with its merits and demerits in AM processing are discussed. The outstanding issues in AM process and steps to overcome with post-processing techniques are elaborated. Finally, the future scope and research directions of the AM process involved in the fabrication of selected components are discussed.

The present-day structural application requires advanced materials at extreme conditions, and the development of it is not economically feasible. As a result, existing material in the composite form has more visibility to suit the purpose. The material's strengths and qualities must be examined before it can be recommended for use in harsh conditions. In the present study, Al ₂ O ₃ (3, 6, 9, 12, and 15 wt.%) and ZrO ₂ particles (2 wt.%) are reinforced with Al-Mg-Si alloy (Al 6061), which possess good isotropic behaviour and better interface bonding. The double stir casting process was adopted for the hybrid composite development, and the samples were cold rolled to reduce grain size and pores in the composites. The developed composites were subjected to mechanical characterisation tests such as hardness, tensile, compression, impact and flexural tests. An increase in reinforcement percentage enhances the mechanical properties. The improvement was attributed to the high thermal mismatch and reduction in the inter-particle distance by cold rolling and the reinforcements. Scanning electron microscope microstructural examination was conducted, and even dispersion of 3 to 15 wt.% Al ₂ O ₃ reinforcements was observed. Tensile elongation decreases with an increase in reinforcement percentage. High elastic modulus and temperature mismatch between matrix and reinforcements increase the strength of the composites. The fracture behaviour of the composites generally showed dimples which are characteristics of ductile fracture, except at 15 wt.% Al ₂ O ₃ / 2 wt.% ZrO ₂ showed a large portion of cleavage planes and grain cracking. The Al-Mg-Si alloy is reinforced with 9 wt%. Al ₂ O ₃ / 2 wt.% ZrO ₂ had the best properties suitable for its use in different structural applications.