DU Haiquan, FAN Yifei, WANG Yi, et al.Effect of Pin Morphology on the Performance of FSW Joint of 2219 Aluminum Alloy[J].Electric Welding Machine, 2023, 53(5): 77-83. DOI： 10.7512/j.issn.1001-2303.2023.05.11.
Effect of Pin Morphology on the Performance of FSW Joint of 2219 Aluminum Alloy
2219 aluminum alloy has been widely used in the manufacture of rocket fuel tanks due to its excellent mechanical properties. FSW is one of the main welding processes of 2219 aluminum alloy. The microstructure and mechanical properties of the joint are directly affected by the morphology of the pin. In order to reveal the effect of the morphology of the pin on the joint performance, the welding numerical analysis was carried out by using semi-helical tri-arcs and full-helical tri-planes geometric structures, moreover, the mechanical properties of the joint under the welding of full-helical tri-planes pin with different thread characteristics were analyzed. The results showed that the effect of the pin geometry on the welding temperature field was slight, however, the flow field and strain rate were strong. Moreover, the connection between the semi-helical tri-arcs and the tunnel hole defect was closer. The experimental results showed that the influence of the characteristics of full-helical tri-planes pin on the microstructure and properties of 13 mm FSW joint were mainly caused by the difference of heat input and temperature distribution.
DU Y F， BAI J B， TIAN Z J， et al. Three dimensional solid coupled numerical simulation of temperature field in 2219 aluminum alloy friction stir welding［J］. Transactions of the China Welding Institution， 2014， 8（35）：57-60.
LI J. Defect control of 2219 aluminum alloy joint by ultrasonic assisted friction stir welding［J］. Hot Working Technology， 2017， 15（46）：199-201.
Anderson-Wedge K，Stubblefield G，Zhu N，et al. Characterization of the evolution of 2219-T87 aluminum as a function of thefriction stir welding process［J］. International Journal of Fatigue， 2021， 142：105954.
Meng X C， Jin Y Y， Jia S D，et al. Improving friction stir weldability of Al/Mg alloys via ultrasonically diminishing pin adhesion［J］. Journal of Materials Science & Technology， 2018， 34：1817-1822.
WANG Y. Research progress of aluminum alloy friction stir welding and material modification［J］. Shanxi Metallurgy， 2020， 5（43）：66-68.
Simar A， Brechet Y， de Meester B， et al. Integrated modeling of friction stir welding of 6xxx series Al alloys： Process， microstructure and properties［J］. Progress in Materials Science， 2012， 57（1）：95-183.
MA H， TIAN Z J， XIONG L Y， et al. Numerical simulation analysis of temperature field and viscous flow layer of 2A14-T6 aluminum alloy friction stir welding［J］， Aeronautical Manufacturing Technology， 2018， 8（61）：55-61.