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

Journal Article · Fri Nov 15 04:00:00 EST 2019 · Journal of Materials Engineering and Performance

DOI:https://doi.org/10.1007/S11665-019-04395-3· OSTI ID:22970360

Dong, Zhibo ^[1]; Yang, Kang; Ren, Rong; Wang, Guoqiang ^[2]; Wang, Lei ^[3]; Lv, Zan ^[2]

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1. Harbin Institute of Technology, State Key Laboratory of Advanced Welding and Joining (China)
2. Shenyang Aerospace University, School of Aerospace Engineering (China)
3. Shenyang Institute of Standardization (China)

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 µm. 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.

• OSTI ID: 22970360
• Journal Information: Journal of Materials Engineering and Performance, Journal Name: Journal of Materials Engineering and Performance Journal Issue: 11 Vol. 28; ISSN 1059-9495; ISSN JMEPEG
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM ALLOYS
FRACTURES
FRICTION
NANOSTRUCTURES
SHEAR PROPERTIES
SYNTHESIS
WELDING