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 HV, welding seam and A6061 aluminum alloy of HV. A large amount of copper elements found in the welds due to using the new welding rod, Aluma-Steel rod. | Journal of Science and Technology 54 (5A) (2016) 64-74 DISSIMILAR JOINING A6061 ALUMINUM ALLOY AND SUS304 STAINLESS STEEL BY THE TUNGSTEN INERT GAS WELDING PROCESS Nguyen Quoc Manh1, *, Dang Thi Huong Thao1, Vu Van Dat2 1 Hung Yen University of Technology and Education, Dan Tien, Khoai Chau, Hung Yen, Vietnam 2 Nam Dinh University of Technology Education, Nam Dinh city, Nam Dinh, Vietnam * Email: manhrobocon@ Received: 15 July 2016; Accepted for publication: 5 December 2016 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 HV, welding seam and A6061 aluminum alloy of 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. 1. INTRODUCTION Dissimilar materials welding helped the potential provided the advantages of two materials often providing for the solutions to engineering requirement order to reduce the weight and corrosion resistance of materials have been a major
