Influence of bottom-threaded pin on hook morphology and mechanical properties of lap welded joint

被引：0
|
作者：
Wu S. [1 ]
Mao Z. [1 ]
Liu X. [2 ]
机构：
[1] CSR Qingdao Sifang Co., Ltd., Qingdao
[2] State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin
来源：
Hanjie Xuebao/Transactions of the China Welding Institution | 2019年 / 40卷 / 03期
关键词：
Friction stir lap welding; Hook; Lap shear failure load; Pin; Thread;
D O I：
10.12073/j.hjxb.2019400068
中图分类号：
学科分类号：
摘要：
Using 3 mm thick 7075-T6 aluminum alloys as the research objects, this work studied the effect of a bottom-threaded pin on hook morphology and mechanical properties of friction stir lap welded joint. The results showed that the thread on the pin could significantly affect the material flow behavior during welding. The plastic material accumulated at the lap interface, squeezing the lap interface, So the hook bended downwards after welding. The width of the stir zone was obviously wider than the diameter of the pin. Because there was on thread on the tip of the pin, void easily appears at the bottom of the stir zone due to incomplete refilling of the plastic material. With increasing the welding speed, the lap shear failure load first increased and then decreased. The maximum failure load of 23.333 kN was obtained at a welding speed of 40 mm/min. © 2019, Editorial Board of Transactions of the China Welding Institution, Magazine Agency Welding. All right reserved.
引用
收藏
页码：37 / 40
页数：3
相关论文
共 10 条
  • [1] Yue Y., Zhou Z., Ji S., Et al., Effect of half-threaded pin on mechanical properties of friction stir lap welded alclad 2024 aluminum alloy, Transactions of the China Welding Institution, 37, 10, pp. 69-72, (2016)
  • [2] Li Z., Yue Y., Ma L., Et al., Effects of pin geometry on the material flow behavior of friction stir spot welded 2A12 aluminum alloy, China Welding, 24, 2, pp. 25-29, (2015)
  • [3] Cantin G., David S., Thomas W., Et al., Friction Skew-stir welding of lap joints in 5083-O aluminum, Science and Technology of Welding and Joining, 10, 3, pp. 268-280, (2005)
  • [4] Salari E., Jahazi M., Khodabandeh A., Et al., Influence of tool geometry and rotational speed on mechanical properties and defect formation in friction stir lap welded 5456 aluminum alloy sheets, Materials & Design, 58, pp. 381-389, (2014)
  • [5] Yue Y., Li Z., Ji S., Et al., Effect of reverse-threaded pin on mechanical properties of friction stir lap welded alclad 2024 aluminum alloy, Journal of Materials Science and Technology, 32, 7, pp. 671-675, (2016)
  • [6] Liu J., Liu X., Xing Y., Influence of pin length on formation and shear failure load of dissimilar Al alloys FSLW joint, Transactions of the China Welding Institution, 39, 6, pp. 91-95, (2018)
  • [7] Wang C., Zhao Y., Dong C., Et al., Analysis on microstructure and mechanical properties of 6063-T6 self-reacting friction stir welding, Transactions of the China Welding Institution, 39, 10, pp. 108-112, (2018)
  • [8] Yin Y.H., Sun N., North T.H., Et al., Hook formation and mechanical properties in AZ31 friction stir spot welds, Journal of Materials Processing Technology, 210, pp. 2062-2070, (2010)
  • [9] Yin Y.H., Sun N., North T.H., Et al., Microstructures and mechanical properties in dissimilar AZ91/AZ31 spot welds, Materials Characterization, 61, pp. 1018-1028, (2010)
  • [10] Li Z., Yue Y., Ji S., Et al., Optimal design of thread geometry and its performance in friction stir spot welding, Materials & Design, 94, 15, pp. 368-376, (2016)
1