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Brazing 6061 aluminum alloy with Al-Si-Zn filler metals containing Sr
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Brazing 6061 aluminum alloy with Al-Si-Zn filler metals containing Sr
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Journal Article
Brazing 6061 aluminum alloy with Al-Si-Zn filler metals containing Sr
2013
Overview
Al-6.5Si-42Zn and Al-6.5Si-42Zn-0.09Sr filler metals were used for brazing 6061 aluminum alloy. Air cooling and water cooling were applied after brazing. Si phase morphologies in the brazing alloy and the brazed joints were investigated. It was found that zinc in the Al-Si filler metals could reduce the formation of eutectic Al-Si phase and lower the brazing temperature at about 520℃. Adding 0.09wt% Sr element into the Al-6.5Si-42Zn alloy caused a-Al phase refinement and transformed acicular Si phase into the finely fiber-like. After water cooling, Zn element dissolved into the Al-Si eutectic area, and η-Zn phase disappeared in the brazed joints. Tensile strength testing results showed that the Sr-modified filler metal could enhance the strength of the brazed joints by 13% than Al-12Si, while water-cooling further improved the strength at 144 MPa.
Publisher
University of Science and Technology Beijing,Springer Nature B.V,School of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China%Zhejiang Xinrui Welding Material Co., Ltd, Shaoxing 312000, China
