Improvement of microstructure and corrosion properties of friction stir welded AA5754 by adding Zn interlayer |
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| Authors: | Ali Shamsipur Amir Anvari Ahmad Keyvani |
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| Institution: | 1.Department of Mining and Metallurgical Engineering,Amirkabir University of Technology,Tehran,Iran;2.School of Metallurgy and Materials Engineering, Faculty of Technology and Engineering,Shahrekord University,Shahrekord,Iran |
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| Abstract: | This study investigated the effect of Zn foil layers on the microstructure and corrosion characteristics of friction stir welded alu-minum alloy 5754. Samples of various joints were prepared by applying different rotational and welding speeds, and their microstructures were evaluated via a metallographic technique and scanning electron microscopy equipped with energy-dispersive X-ray spectroscopy ele-mental analysis. The anticorrosion behavior of joints in the absence and presence of a Zn interlayer was studied by cyclic potentiodynamic polarization test in 3.5wt％ NaCl aqueous solution, and sound welds were obtained in the presence of the Zn interlayer foil. The results re-vealed that the joint made at a rotational speed of 800 r/min and traveling speed of 15 mm/min achieved a chemical composition identical to that of aluminum alloy 7xxx series, and as such, it showed the best resistance to corrosion. |
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