The University of Osaka · Engineering
Professor Dongsheng Wu's research lab specializes in advanced welding and additive manufacturing processes, with a focus on the multi-physics modeling of arc welding, keyhole dynamics, and molten pool behavior. The lab investigates the complex interactions between thermal, fluid, and electromagnetic forces in processes such as keyhole plasma arc welding (KPAW), wire arc additive manufacturing (WAAM), and tandem TIG welding, particularly for high-performance alloys like γ-TiAl and aluminum alloys. Experimental validation using high-speed imaging and advanced diagnostics is integrated with numerical simulations to optimize process stability, element distribution, and energy efficiency. The lab's work aims to enhance the quality, reliability, and efficiency of modern joining and additive manufacturing technologies.
Figures are computed from collected data and may differ slightly.
Abstract A novel electrode-arc-weld pool model considering the influence of the backside keyhole deviation on the heat source distribution, the influence of the keyhole constraint on the arc pressure and the keyhole geometry dependent plasma shear stress, is developed to study the keyhole formation in the KPAW process. The numerical and experimental results show that: the keyhole depth increases very quickly at first, then smoothly, and then quickly again. In the blind keyhole stage, the arc pre
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