Abstract

This research demonstrates the feasibility of filler rod fabrication to develop nanocomposite weldment to enhance the joint strength via ARB technique. Al 3003 alloys were joined through GTAW by melting fabricated nanocomposite filler metal. TiO₂ nanoparticles were chosen as reinforcement from 0 to 3 wt%. Roll bonding is desired owing to the proper distribution of TiO₂ particles. SEM depicted the distribution of reinforcement particles in the grain boundaries. TEM disclosed the uniformity in particulates distribution, peening of dislocation and strain fields in 12 wt% TiO₂ reinforced nanocomposite weldment. EBSD portrayed the grain refinement occurred in the weld zone due to reinforcement addition. The improvement in impact and bending strength were due to excellent bonding between the Al and reinforcement particles and excellent load transfer ability provided by reinforcement particles.

Graphic Abstract

中文翻译：

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使用 ARB 填充金属延缓 Al 3003 纳米复合焊缝中晶粒的生长

摘要

这项研究证明了制造填充棒以开发纳米复合焊件以通过 ARB 技术提高接头强度的可行性。Al 3003 合金通过熔化制造的纳米复合填充金属通过 GTAW 连接起来。TiO ₂纳米颗粒被选为0至3wt%的增强剂。由于TiO ₂颗粒的适当分布，因此需要辊压粘合。SEM 描绘了增强颗粒在晶界中的分布。TEM 揭示了 12 wt% TiO ₂中颗粒分布的均匀性、位错和应变场的喷丸增强型纳米复合焊件。EBSD 描绘了由于添加钢筋而在焊缝区发生的晶粒细化。冲击强度和弯曲强度的提高是由于铝和增强颗粒之间的良好结合以及增强颗粒提供的优异载荷传递能力。

图形摘要