Abstract In the present work, an innovative approach by adding the filler materials containing ZrO2/TiO2 hybrid nanoparticles to the weld pool during tungsten inert gas (TIG) welding under ultrasonic vibration (UV) was developed to fabricate nanostructured welds. Nanocomposite filler materials were manufactured from Al–Si alloy strips and ZrO2/TiO2 hybrid nanoparticles using accumulative roll bonding. After TIG welding, the influence of UV on the nanoparticle dispersion as well as the microstructure of welds was assessed using electron microscopes (SEM and TEM). When UV treatment was applied, the morphology of α-Al grains was changed from a coarse dendritic structure to a fine and globular shape and Al–Si eutectic phase was significantly refined. The results depict that the addition of nanoparticles together with application of UV can improve the grain refinement and as a result increases the mechanical properties than that of conventional TIG welding.

中文翻译：

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在 TIG 焊接过程中应用超声波振动作为开发纳米粒子弥散强化铝焊件的一种有前途的方法

摘要 在目前的工作中，开发了一种在超声波振动 (UV) 下钨惰性气体 (TIG) 焊接过程中通过将含有 ZrO2/TiO2 杂化纳米颗粒的填充材料添加到焊池中的创新方法来制造纳米结构焊缝。纳米复合填料是由铝硅合金条和 ZrO2/TiO2 混合纳米颗粒使用累积辊压制成的。TIG 焊接后，使用电子显微镜（SEM 和 TEM）评估 UV 对纳米颗粒分散以及焊缝微观结构的影响。应用UV处理后，α-Al晶粒的形貌从粗大的枝晶结构转变为细小球状，Al-Si共晶相显着细化。