Stepped-shoulder friction stir welding to alleviate weld thinning for dissimilar AA2195-T8/AA2219-T6 alloys

被引：16
作者：
Ma, Xiaotian [1 ]
Xie, Yuming [1 ]
Meng, Xiangchen [1 ]
Chen, Huizi [1 ]
Wang, Feifan [2 ]
Jiang, Yimeng [2 ]
Wan, Long [1 ]
Huang, Yongxian [1 ]
机构：
[1] Harbin Inst Technol, State Key Lab Adv Welding & Joining, Harbin 150001, Peoples R China
[2] China Acad Launch Vehicle Technol, Beijing Inst Astronaut Syst Engn, Beijing, Peoples R China
来源：
SCIENCE AND TECHNOLOGY OF WELDING AND JOINING | 2021年 / 26卷 / 08期
基金：
中国国家自然科学基金;
关键词：
Friction stir welding; dissimilar materials; aluminium alloys; weld thinning; microstructure; mechanical properties; MECHANICAL-PROPERTIES; ALUMINUM-ALLOY; FRACTURE-BEHAVIOR; MICROSTRUCTURE; FEATURES;
D O I：
10.1080/13621718.2021.1982341
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A stepped-shoulder friction stir welding tool containing a protruding inner shoulder and an outer shoulder was proposed to join AA2195-T8 Al-Cu-Li and AA2219-T6 Al-Cu alloys. The inner shoulder with a considerable plunge depth enhanced forging effect, and the outer shoulder with a low plunge depth prevented plasticized materials from overflowing out of welds, while the pin with milling facet promoted material flow. The sound joint with a weld thinning of 0.05 mm (about 0.8% of the workpiece) was obtained. The interface between the two materials was free of cavities and kissing bond. The joint fractured in thermo-mechanically affected zone on the side of AA2219-T6 alloy. The tensile strength reached 352 MPa, equal to 81.7% of base AA2219-T6 alloys.
引用
收藏
页码：599 / 605
页数：7
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