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WELDING ARTICLES

Effect of Welding Time on the Joining Phenomena of Diffusion Welded Joint between Aluminum Alloy and Stainless Steel

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Pages 1366-1369 | Received 15 Apr 2011, Accepted 13 Nov 2011, Published online: 26 Nov 2012
 

Abstract

In the present study, direct diffusion welding of aluminum alloy 5A02 and stainless steel SUS304 has been carried out in vacuum in the welding time range of 35–110 minutes. The effect of welding time on the interfacial microstructure and tensile shear strength of the joint were investigated. The joint with tensile shear strength of 101.3 MPa was obtained under the condition of the welding time of 60 minutes. The results reveal that the reaction layer thickness increases with the increasing of welding time and that the reaction layer consists of Al5Fe2 and Al13Fe4 formed in the interface. The strength of the joint is related to the reaction layer thickness and the value of the joint strength reached maximum when the reaction layer thickness was approximately 0.8 µm.

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