Study on Defects of T-joints by Corner Stationary Shoulder Friction Stir Welding

被引：0
|
作者：
Zeng S. [1 ,2 ]
Chen G. [1 ,2 ]
Liu Q. [1 ,2 ]
Zhang G. [1 ,2 ]
Shi Q. [1 ,2 ]
机构：
[1] Department of Mechanical Engineering, Tsinghua University, Beijing
[2] Key Laboratory of Advanced Material Processing Technology, Ministry of Education of China, Tsinghua Unive小sity, Beijing
来源：
Jixie Gongcheng Xuebao/Journal of Mechanical Engineering | 2020年 / 56卷 / 06期
关键词：
Corner stationary shoulder friction stir welding; Defects; Formation mechanism; Material flow; T-joint;
D O I：
10.3901/JME.2020.06.193
中图分类号：
学科分类号：
摘要：
The defect free T-joints obtained by corner stationary shoulder friction stir welding. Three different pins, i.e. tapered pin, tapered pin with thread, short cylindrical pin, are used for friction stir welding of 6 mm thick 6082-T6 T-joint aluminum alloy from the inner corner weld, and corresponding analysis of the macro defects of the weld is carried out. It is found that the tunnel or groove defects are easily produced on the advancing side of the corner joint during friction stir welding. The defects are affected by the pin and corner stationary shoulder. The plastic material flow region on the upper part of pin will be formed around tool under the influence of the corner stationary shoulder and the upper part of the pin. The plastic material flow region on the lower part of the pin will be formed under the influence of the lower part of the pin. Besides, the tunnel defects on the upper part of the pin is affected by the stationary shoulder of 90°profile corner stationary shoulder, The defect free T-joints can be obtained by changing the tool tilt angle, and the physical model of the defect formation mechanism is analyzed. © 2020 Journal of Mechanical Engineering.
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页码：193 / 199
页数：6
相关论文
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