Influences of TIG welding parameters on tensile and impact behaviour of aluminium alloy joints: A Review
Aluminium is a non magnetic, silvery white, ductile and soft metal which is the most abundant metal and the third most abundant element in the earth crust. It also makes its existence in the form of its alloys in which aluminium is predominant metal. Copper, magnesium, manganese, silicon, tin and zinc are the typical alloying metals. Aluminium alloys are widely used in engineering structure, components and aerospace manufacturing where light weight and corrosion resistance is required. TIG welding is a precise and fastest welding technique able to weld ferrous and non ferrous metals. It is highly controllable, fumeless and spatter less clean process needs very little finishing or sometime no finishing. The present work deals with the identification of best combination of welding parameters for TIG welding of AA7005. From the literature survey, it is found that welding of aluminium is very difficult with conventional arc welding processes. There are no. of welding parameters which affect the welding quality for again repeatability. Different parameteric ranges their effects are studied. In this particular study, TIG welding set up will be used to weld 10mm thick AA7005 plate by changing the welding parameters. The effect of these parameters on tensile and impact strength of welding joints will be analyzed. KeywordsTIG welding, AA7005, Welding current, Gas flow rate, Welding speed, Tensile strength, Impact strength.