Study on FSW Butt Joint Properties of Dissimilar Wrought AA6063-T1 Aluminum Alloy and Cast Al-Mg Aluminum Alloy

Abstract:

This paper focused on applying friction stir weld method on welding a butt joint of wrought6063-T1 aluminum alloy and cast Mg-Si aluminum alloy and studied on effect of various parameterssuch as rotating speeds and travelling speeds. The experiment revealed that a variation of the rotatingand travelling speeds affected to vary the weld quality. Higher rotating speed and higher travellingspeed produced the defects such as voids that directly decreased tensile strength of the joint. Whenthe sound weld metal with the high tensile strength was produced, the failure of the tensile testspecimen was located at the cast aluminum alloy. The average tensile strength of the sound joints was10-15% higher than that of the cast aluminum alloy. Microstructure investigation of the specimenwith the optimum welding parameter revealed that the combination of the aluminum alloys wascompleted without any defect in the weld metal. Compressed force by the welding tool produced thesmall compacted grain in the weld metal and small combined banding area at the interface of boththe cast aluminum alloy and the weld metal.

• Periodical: Key Engineering Materials (Volume 789)
• Pages: 115-119
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.789.115
• Online since: November 2018
• Authors: Kittipong Kimapong*, Wipa Taweekaew, Surat Triwanapong
• Keywords: Butt Joint, Cast Aluminum, Friction Stir Welding, Tensile Strength, Wrought Aluminum

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