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Essay On Welding Aluminium

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1. INTRODUCTION
Aluminium and its alloys are used in fabrications because of their low weight, good corrosion resistance and weldability. This encourages the use of aluminium and its alloy in aerospace industry, internal combustion engine parts, ship building etc. [1]. Welding being most widely used joining method can be used for welding aluminium. Tungsten inert gas welding (TIG) and metal inert gas welding (MIG) are commonly used for aluminium. In this study TIG welding is used since TIG welding process offers great advantages such as cleanliness, deposition rate, heat input etc.) Tungsten inert gas welding (TIG) is a process that melts and joins metals by heating them with an arc established between a non consumable tungsten electrode and
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These specimens are then welded with a root gap distance 1 mm. Based on the literature review, it was found that welding current, gas flow rate and filler material affects the mechanical properties of welded joint. Hence, it is decided to perform experiments by varying the welding current, gas flow rate and filler materials. The levels of different parameters are given in the table 2.4 below. The prepared specimens are welded successfully at given process parameters. Total 18 specimens are prepared and then tensile testing performed on universal testing …show more content…
As the current level increases, one can observe that there is improvement in tensile strength. It may be due to increased heat input thus increasing welding depth which may leads to increase in tensile strength. With changing flow rate of shielding gas from 8 to 10 Lpm, difference in tensile strength can be observed. It may be due to the better protection of weld pool from the atmospheric gases thus lesser defects which resulted improvement in tensile

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