Laser welding/brazing of 5182 aluminium alloy to ZEK100 magnesium alloy using a nickel interlayer |
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| Authors: | Jin Yang Zhishui Yu Yulong Li Hua Zhang Norman Zhou |
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| Affiliation: | 1. School of Materials Engineering, Shanghai University of Engineering Science, Shanghai, People’s Republic of China;2. Key Lab of Robot and Welding Automation of Jiangxi Province, School of Mechanical and Electrical Engineering, Nanchang University, Nanchang, People’s Republic of China;3. Center for Advanced Materials Joining, University of Waterloo, Waterloo, Canada |
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| Abstract: | Aluminium alloy and magnesium alloy were successfully joined by using laser welding/brazing technology via a nickel interlayer. Microstructure and mechanical properties of the dissimilar Al/Mg joints with and without a nickel interlayer were comparatively investigated. No joints were achieved without a nickel interlayer; after welding, specimens were separated without applying any force. By inserting a nickel interlayer, sound metallurgical bonding were obtained at the interfaces. Hence, the joint strength reached 410 N with the failure at Mg/Ni interface. The influence of Ni interlayer on the weld defect, microstructure and joint strength was studied, and the joint formation mechanism was also discussed. |
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| Keywords: | Laser welding/brazing aluminium alloy magnesium alloy nickel interlayer intermetallic compounds joint strength |
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