A theoretical study of molten pool behavior and humping formation in full penetration high-speed gas tungsten arc welding

A clear insight into the full penetration humping (FP-humping) formation in high-speed gas tungsten arc welding (GTAW) is difficult owning to the complex and multi-coupled transport phenomena in molten pool. In this paper, sensitivity analysis and dimensional analysis are combined to study the molten pool behavior and FP-humping formation. Firstly, sensitivity analysis and an experimentally-verified numerical model are used to clarify the effect...