The main purpose of this study was to evaluate the effect of adding CNT on the properties of dissimilar friction stir welded aluminum alloys. For this purpose, a tool with threaded tapered cylindrical pin was designed and manufactured from H13 hot working steel. Reliability of the joints was assessed by non-destructive tests such as visual inspection, ultrasonic and radiography. Tensile joint efficiency of successful dissimilar welds was more than 100% for 4 mm/min tool transverse speed and 2000 rpm tool rotational rate. Electron microscopy evaluation of fractured surfaces indicated that the dominant failure mechanism was ductile fracture. Addition of CNT into the joint area during welding led to hardness and wear resistance increment while reduced the ductility of welding samples. The friction coefficient in the two-passes welded sample was about 30% lower than the friction coefficient of the base metal.

这项研究的主要目的是评估添加CNT对异种搅拌摩擦焊接铝合金的性能的影响。为此，由H13热作钢设计并制造了带有螺纹锥形圆柱销的工具。关节的可靠性通过无损检测，例如目测，超声和放射照相来评估。对于4 mm / min的工具横向速度和2000 rpm的工具转速，成功的异种焊缝的拉伸接头效率超过100％。断裂表面的电子显微镜评估表明，主要的破坏机理是韧性断裂。在焊接过程中将碳纳米管添加到接头区域中会导致硬度和耐磨性增加，同时会降低焊接样品的延展性。