Weld Quality Improvement using GMAW-GTAW Hybrid Welding Process for Aluminum Alloy

Abstract One of the major challenges in welding aluminum alloys is the formation of porosity in weld metal, which diminishes mechanical properties and usability. Therefore, this research aims to study the feasibility of developing a welding technique using a hybrid welding to improve weld quality by minimizing porosity. The hybrid welding process consists of two techniques: gas metal arc welding and gas tungsten arc welding. High-speed video analysis examined metal transfer, weld pool behavior, and oxide cleaning action. Radiographic testing was employed to evaluate the porosity in weld metal. The results demonstrated a significant decrease in the number of porosities. Additionally, this research proposes guidelines for welding variable selection and equipment setup, offering a comprehensive strategy for achieving improved weld quality.