Bobbin friction stir welding of AA1100

Shamsharhadi, Muhammad Izzuddin (2018) Bobbin friction stir welding of AA1100. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

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Abstract

Bobbin friction stir welding (BFSW) is a welding technique by using a non-consumable tool that will rotate between the two part need to be weld to produce joining. The purpose of this research is to study the optimum weld parameter on an AA1100 alloy. In this research, the parameter has been set to the spindle and welding speed. The experiment will be conducted using a conventional milling machine that will act as the rotational device for the tool to weld the material. The material to be weld is in 6mm thickness with length of 140mm and width 140mm. The parameters selected which are spindle speed (800, 900 and 1000 rpm) and welding speed (80,115, and 155 mm/min) are based on the machine capability and previous recorded study. During the welding process, the weld response which are vibration, current and temperature also had been recorded to investigate the behavior of the weld response during the welding process. After the welding process, the weld sample then undergoes mechanical test using the appropriate devices and methods. Response Surface Methodology (RSM) with historical data type is used as the design of experiment and using Ultimate Tensile Strength (UTS) as the output response to find the optimum parameter for the welding process. The finding has stated that the optimum parameter was achieved when the spindle speed is at 1000 rpm with welding speed of 155 mm/min the results was approved with a minimum percentage error of 8.43%.

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