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Friction stir welding (FSW) is a solid state joining process that provides many advantages such as microstructure and mechanicalproperties than conventional methods in welding aluminum alloys. When compared with conventional fusion welding methods it gives advantages such as lower residual stresses, especially high joint strength and low distortion because of lower welding temperature and also elimination of porosities and solidification cracking because of no melting occurrence.The FSW process exhibits a number of attractive advantages when compared to other welding processes, perhaps the most significant of which is the ability to weld alloys that are difficult or impossible to weld using fusion welding techniques. In this review the microstructures and mechanical properties of friction stir welding of various Al-alloys.

Aluminium metal matrix composites (AMMCs) have received extensive attention for practical as well as fundamental reasons. Aluminium alloys and aluminum-based metal matrix composites have found applications in the manufacture of various automotive, agriculture, Space shuttles and marine applications. Aluminium Metal Matrix Composites are finding increased applications in aerospace, automobile, space, underwater, and transportation applications. This is mainly due to improved mechanical and tribological properties like strong, stiff, abrasion and impact resistant, and is not easily corroded. This paper presents to review the different combination of reinforcing materials used in the processing of aluminum matrix composites and how it affects mechanical, corrosion wear performance of the materials.

Composites play a vital role in aerospace, land, and goods due to their high toughness and stiffness's, strength to weight ratio. GFRP glass fabric is crucial in obtaining consisting values of composites. In the present investigation to improve impact properties, three different resin matrix systems were used in conjunction with fabric. The epoxy (L-12), epoxy with 10% of silica particles and epoxy with 10% of glass flakes. Test procedure carried out in ASTM-D Specifications D-790, 0-90 o orientations.

The use of aluminum alloys in manufacturing industry has increased significantly in recent years. This is because primarily to their ability to combine lightness and strength in a single material. Concomitant to this growth, the machining of aluminum alloys has enormously increased in volumetric proportionsso that the chip volume represents up to 80 % of the original volume of the machined material in certain segments of the industry, like aerospace. In this context, knowledge of the characteristics of machinability of aluminum alloys is essential to provide industry and researchers with information that allows them to make the right decisions when they come to machining this fantastic material. The purpose of this review is to compile relevant information about the characteristics of machinability of aluminum alloys into a single document.