Tensile Properties Analysis By Simulation And Experiment Of Thin Sheet Plate Welded By GMAW

Zulkefle, Zulaikha (2019) Tensile Properties Analysis By Simulation And Experiment Of Thin Sheet Plate Welded By GMAW. Project Report. UTeM, Melaka, Malaysia. (Submitted)

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Abstract

Gas Metal Arc Welding (GMAW) process is a leading development in arc welding process as it provides high productivity and good weld quality. The purpose of this study was to understand how the welding parameter effects the tensile properties and distortion of thin plate welding with dissimilar thickness by Cold Arc welding. Cold Arc is the advanced GMAW welding process which transmit low heat input thus it is suitable to be used for thin steel plate. The welding process performed by using ER70S-6 filler wire and use Robotic GMAW Kuka KRC4 with the power source EWM Cold Arc. The set of parameters is designed by Minitab. The combinations of welding voltage, welding current, and welding speed in which can form the heat input of the process were employed in this study. The tensile strength and distortion of the lap joint with a dissimilar thickness were studied. Furthermore, data was analysed by using Response Surface Methodology to propose optimum welding parameter that can minimize distortion and maximise tensile strength for thin plate welding by “ColdArc” technology. The optimum parameter proposed by RSM method was 53.45 A for current, 17.23 V for voltage and welding speed of 0.21 m/min and heat input is calculated. As a result, rise in heat input decreased tensile strength of the weld joint. For bending distortion, as the heat input increase the distortion increased. Also, using SolidWorks software the tensile strength of welded joined was simulated and compared with experimental results.

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