Materials Engineering Department
BS in Materials Engineering
The purpose of this study was to determine relationships between bagging methods and pre-weld holding times on the formation of porosity when AC-TIG welding 2219 aluminum. Considering the strict guidelines and specifications required within the aerospace industry, maintaining quality welds is of paramount importance to control part integrity for aerospace applications. This project focused on two parameters involved in the preparation of aluminum parts for welding: bagging method and pre-weld holding time. Welding geometry was simplified to bead-on plate instead of the standard joint welds. Radiographic analysis of the samples showed that all levels of both parameters produced “passing welds.” Further investigation using metallography showed that there is no clear relationship between the bagging method and holding time on the formation of porosity. The implications of these results may help simplify the preparation of parts for welding and therefore help minimize costs and increase productivity while maintaining weld quality.