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The International Journal of Advanced Manufacturing Technology
Erschienen in: The International Journal of Advanced Manufacturing Technology 3-4/2024

13.12.2023 | ORIGINAL ARTICLE

Quality improvement of refill friction stir spot welds in 2A12-T42 aluminum alloy with alclad by adjusting sleeve design

verfasst von: Guangda Sun, Yuxuan Li, Zili Zhang, Li Zhou, Ning Guo, Huaxia Zhao, Jihong Dong, Qiang Meng

Erschienen in: The International Journal of Advanced Manufacturing Technology | Ausgabe 3-4/2024

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Abstract

In this study, a modified sleeve was utilized for refill friction stir spot welding (RFSSW) of 2A12-T42 aluminum alloy sheet compared to a conventional one. The effect of sleeve design on the macrostructures, material behavior and mechanical properties of joints at various plunge depths was comprehensively studied. The modified sleeve improved the tensile-shear performance of the joints by eliminating groove defects and inhibiting the formation of hooking features. The tensile-shear failure load (TSFL) was increased by 37% to 9.80 kN with a plunge depth of 3.0 mm, which can be attributed to the refined fine grain structure and downward material flow induced by grooves. Lap-sheared joints exhibited shear fracture as well as plug type fracture on both upper and lower sheets. Shear fracture occurred with a small plunge depth due to the unstirred, weak alclad along the interface. For modified sleeves, the joints showed plug type fracture (on the lower sheet) when plunge depths exceeded 2.0 mm. Dimple-dominated ductile fracture mechanisms were identified in all cases.
Vorheriger Artikel Design and processing behavior of large tubes with a rotating magnetic pole core-based magnetic abrasive finishing
Nächster Artikel Investigation of surface imperfection in freeform optics with high-order XY polynomial design

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Metadaten
Titel
Quality improvement of refill friction stir spot welds in 2A12-T42 aluminum alloy with alclad by adjusting sleeve design
verfasst von
Guangda Sun
Yuxuan Li
Zili Zhang
Li Zhou
Ning Guo
Huaxia Zhao
Jihong Dong
Qiang Meng
Publikationsdatum
13.12.2023
Verlag
Springer London
Erschienen in
The International Journal of Advanced Manufacturing Technology / Ausgabe 3-4/2024
Print ISSN: 0268-3768
Elektronische ISSN: 1433-3015
DOI
https://doi.org/10.1007/s00170-023-12834-8

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