Study on properties of 304 wire arc additive manufacturing stainless steel TIG welded joints

In this study, 304 stainless steel thin-wall component were obtained by wire arc additive manufacturing (WAAM) as one of the methods of additive manufacturing. In view of the limits that the WAAM technology can not produce large and complex components at one time, TIG welding was chosen during secondary processing to achieve the effectively connection. Weldability, microstructure, texture strength and mechanical properties were particularly investigated when welding along the traveling and building direction. The results show that welding along the traveling direction gained better performance weld joints than building direction including higher tensile and yield strength, greater elongation and lower texture strength. Besides, the grain orientation changed from [0 0 1] before welding to [1 1 1] after welding in both traveling and building direction.