(1) 挑战传统的电弧物理理论：学术界主流观点认为，钨极氩弧熔池表面中心处的金属蒸汽浓度最高；等离子弧是高能束，熔池温度很高；小孔提高能量效率；电弧焊接在大电流条件下产生咬边；近些年有学者提出，激光金属蒸汽降低电弧温度和电导率，从而造成电弧失稳。 基于先进检测技术和数值模拟研究发现，熔池表面的金属蒸汽会扩散到钨极，钨极附近金属蒸汽浓度最高；等离子弧小孔降低熔池温度和电弧能量效率，促进咬边产生；低沸点元素的含量、蒸发温度和电离能对激光和电弧相互作用具有重要影响。 (2) 开发先进连接技术：开发先进钛管双枪TIG焊技术，获春晖杯留学人员创新创业大赛优胜奖，且已产业化应用；开发蓝红光复合连接技术，获激光金耀奖并入选我国焊接科技创新成果。 (3) 荣誉和奖励 获得国际焊接学会Henry Granjon Award、美国焊接学会William Spraragen Memorial Award、中国留日同学会赏和激光金耀奖等12项奖励。。 (4) 代表性论文(以第一/通讯作者在Addit Manuf和Virtual Phys Prototyp等期刊上发表SCI论文39篇)： [1] Sun, J., Li, Z., Wu, D. *, Komen, H., Tanaka, M., Volpp, J., ... & Feng, K. (2025). High-speed laser-directed energy deposition of crack-free wear-resistant and anti-corrosive Al/Cu bimetal components. Virtual and Physical Prototyping, 20(1), e2438885. [2] Wang, Y., Wu, D. *, Chen, J. *, Komen, H., Chen, M., Su, H., ... & Tanaka, M. (2025). Pore suppression and performance improvement mechanisms in wire-arc directed energy deposition of 7075 alloy. Virtual and Physical Prototyping, 20(1), e2464953. [3] Yu, C., Zhang, D. *, Liu, Z., Wu, D. *, Zhong, Y., & Wu, J. (2025). Study on nitrogen pores, microstructure, and mechanical properties of nickel-free high-nitrogen stainless steel fabricated via LDED regulated by heat input. Virtual and Physical Prototyping, 20(1), e2445711. [4] Xiao, X., Wu, D.*, Komen, H., Meng, L., Zhang, W., Zhao, P., ... & Tanaka, M. (2024). Influencing mechanisms of melt behavior on metal vapor characteristic and columnar grain formation in wire-arc directed energy deposition of titanium alloy. Additive Manufacturing, 82, 104029. [5] Xiao, X., Zhang, C., Wu, D.*, Komen, H., Gou, J., Zhang, Y., ... & Tanaka, M. (2024). Stabilising mechanism of cathode jet and droplet transfer in hybrid-laser–GMAW-based directed energy deposition of titanium alloy. Virtual and Physical Prototyping, 19(1), e2384659. [6] Wu, D., Komen, H., Asai, Y., Tanaka, M., & Murata, A. (2024). Arc micro-joining of Al and Cu foils. International Communications in Heat and Mass Transfer, 156, 107681. |