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Journal of Materials Engineering and Performance

Published in:

23-10-2019

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

Authors: Zhibo Dong, Kang Yang, Rong Ren, Guoqiang Wang, Lei Wang, Zan Lv

Published in: Journal of Materials Engineering and Performance | Issue 11/2019

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Abstract

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.

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Title: Friction Stir Lap Welding 0.8-mm-Thick 2024 Aluminum Alloy with the Assistance of Stationary Shoulder
Authors: Zhibo Dong
Kang Yang
Rong Ren
Guoqiang Wang
Lei Wang
Zan Lv
Publication date: 23-10-2019
Publisher: Springer US
Published in: Journal of Materials Engineering and Performance / Issue 11/2019
Print ISSN: 1059-9495
Electronic ISSN: 1544-1024
DOI: https://doi.org/10.1007/s11665-019-04395-3

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