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

页码：6704 / 6713

页数：10

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