Friction Stir Lap Welding 0.8-mm-Thick 2024 Aluminum Alloy with the Assistance of Stationary Shoulder

被引：5
作者：
Dong, Zhibo [1 ]
Yang, Kang [2 ]
Ren, Rong [2 ]
Wang, Guoqiang [2 ]
Wang, Lei [3 ]
Lv, Zan [2 ]
机构：
[1] Harbin Inst Technol, State Key Lab Adv Welding & Joining, Harbin 150001, Heilongjiang, Peoples R China
[2] Shenyang Aerosp Univ, Sch Aerosp Engn, Shenyang 110136, Liaoning, Peoples R China
[3] Shenyang Inst Standardizat, Shenyang 110021, Liaoning, Peoples R China
来源：
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE | 2019年 / 28卷 / 11期
基金：
美国国家科学基金会;
关键词：
friction stir lap welding; lap shear failure load; sheet thickness reduction; stationary shoulder; MECHANICAL-PROPERTIES; MICROSTRUCTURES; SPEED;
D O I：
10.1007/s11665-019-04395-3
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
In this work, 0.8-mm-thick 2024 aluminum alloy was friction stir lap welded with the assistance of a stationary shoulder system. The joint surface formation, microstructure and mechanical properties of the welded joints were studied. The results showed that sound joints without defect could be obtained at a wide parameter range because stationary shoulder increased the material flow during welding. The stationary shoulder decreased the joint roughness from 125.5 to 58.9 mu m. A thickness reduction of 4% was achieved at a welding speed of 200 mm/min. The joint fabricated by the stationary shoulder system had superior lap shear properties compared to the joint fabricated using the conventional tool. A high failure load of 7440 N was achieved at welding speed of 200 mm/min. The joint presented tensile fracture mode and the fracture morphology showed typical ductile fracture.
引用
收藏
页码：6704 / 6713
页数：10
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