อิทธิพลความเร็วเดินแนวของการเชื่อมด้วยการเสียดทานแบบกวน ต่อความแข็งแรงดึงของรอยต่อชนอลูมิเนียม 6063-T1

Abstract

This paper aims to present the effect of Friction Stir Welding (FSW) speed on tensile strength of AA6063-T1 aluminum alloy butt joint. The main results obtained are as follows. The variation of a welding speed to produce the butt joint of aluminum alloy gave various tensile strengths and macrostructure of butt joints. The increase of the welding speed increased the tensile strength of the butt joint because the defect size that was formed in the weld decreased when the higher welding speed was applied. However, when the welding speed was too high such as 150-200 mm/min, the defect on the welding bead surface and the larger defect at the advancing side of the joint cross section were produced and decreased directly the joint tensile strength. The microstructure of the joint showed the re-crystallization grain that had the round shape and smaller grain size when compared to the aluminum base materials.