Author(s): Manash Bhuyan and Anil Borah

Abstract: The search for new materials with enhanced properties for industrial and structural applications has led to the development of many metallic alloys. A metallic alloy is a solid solution made of two or metal elements or metal and non-metal elements in a metallic matrix. Alloys can be a homogenous solid solution, a heterogeneous mixture of tiny crystals, a true chemical compound or a mixture of these. Alloys tend to have properties which are often superior to that of their constituent elements. The alloys of aluminium are basically of two types: Heat Treatable and Non Heat Treatable. The heat treatable aluminium alloys are broadly grouped under three series namely 2xxx series (with Cu as principal alloying element and Mg as secondary addition), 6xxx series (with Mg and Si as principal alloying elements) and 7xxx series (with Zn, Cu, and Mg as principal alloying elements). It is observed that in different countries there are various investigations are carried out on 2xxx (Al-Cu-Mg) Al-alloys with different alloying elements. The phenomenon of strengthening in commercial Al-alloys is well established and the developments has almost saturated. The present trend in improving the Mechanical properties of these light weight alloys are by micro-alloying. In this review paper the effect of microalloying on 2xxx series Al-alloys by using various metals are discussed elaborately.

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