DISSIMILAR JOINING A6061 ALUMINUM ALLOY AND SUS304 STAINLESS STEEL BY THE TUNGSTEN INERT GAS WELDING PROCESS

Nguyen Quoc Manh

Abstract


Welding dissimilar materials has been widely applied in industries. Some of them are considered this as a strategy to develop their future technology products. Aluminum alloy and stainless steel have differences in physical, thermal, mechanical and metallurgic properties. However, selecting a suitable welding process and welding rods can solve this problem. This research aimed to investigate the T-joint welding between A6061 aluminum alloy and SUS304 stainless steel using new welding rods, Aluma-Steel by the Tungsten Inert Gas (TIG) welding process. The mechanical properties, the characteristics of microstructure, and component analysis of the welds have been investigated by the mechanical testing, microhardness testing, scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS). As a result, the fracture occurred at the adjacent area between welding seam and A6061 aluminum alloy plate. The average microhardness between welding seam and SUS304 stainless steel is 279.72 HV, welding seam and A6061 aluminum alloy of 274.50 HV. A large amount of copper elements found in the welds due to using the new welding rod, Aluma-Steel rod.


Keywords


TIG welding, T-joint, A6061 alloy, SUS304 stainless steel, Aluma-Steel rod.

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DOI: https://doi.org/10.15625/2525-2518/54/5A/12062 Display counter: Abstract : 161 views. PDF : 86 views.

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Published by Vietnam Academy of Science and Technology