Tailor orbital welding on aluminium alloy 6063

Sharum, Aisyah (2015) Tailor orbital welding on aluminium alloy 6063. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

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Abstract

The main goal of this project is to ‘Develop the Optimized Parameter for Orbital Welding on Aluminum Alloy 6061’ and also to relate the hardness effect and tensile properties to the microstructure of the aluminum alloy 6061. The parameters used as manipulated variable are the peak current and travel speed. An experiment was conducted to find the optimize value of these two selected parameters. The present study tested that when peak current is 230 A resulting incomplete penetration and also lack of fusion while if the peak current is 250 A resulting spatters and also overheating. In term of travel speed, when the travel speed is 50 cm/min, it causes welding bead with small size, 5mm which resulting weak weld. It also causes poor penetration. When the travel speed is 30 cm/min, it piling up the weld metal and can cause too much penetration. Experimental design of this study based on Factorial method. Two Level Factorial design was selected to arrange the welding parameters of peak current with range of 230 to 250 A, travel speed of welding with 30 to 50 cm/min, and wire speed is constant (80 cm/min). The values were recorded from tensile test and microhardness test. From the results, maximum tensile test (60.23MPa) and microhardness value (56.40 HV) obtained by peak current of 240.82 A and travel speed of 30 cm/min.

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