The fabrication of surface composite through friction stir processing (FSP) introduces certain challenges, including insufficient heat generation and non-uniform distribution of reinforcement particles. The implementation of multi-pass FSP can partially reduce these issues; however, it comes at the cost of increased manufacturing time and labour costs. In order to address these challenges comprehensively, a novel counter-rotating twin-tool friction stir processing (CRTTFSP) technology was utilized for fabrication of Al/SiC surface composite. The presence of hard SiC particles notably improved the microhardness of the composite. High heat generation and counter-rotation of the twin-tool, contributed to better particle distribution, which led to consistent microhardness values. Hence, this technology offers uniform mechanical properties of the fabricated composite and also eliminates the need of repetitive processing over the same zone, resulting in considerable reductions in both manufacturing time and associated costs making it more suitable for industrial applications.

通过搅拌摩擦加工（FSP）制造表面复合材料带来了一些挑战，包括热量产生不足和增强颗粒分布不均匀。多通道FSP的实施可以部分减少这些问题；然而，这是以增加制造时间和劳动力成本为代价的。为了全面应对这些挑战，采用新型反向旋转双工具搅拌摩擦加工（CRTTFSP）技术来制造 Al/SiC 表面复合材料。硬质SiC 颗粒的存在显着提高了复合材料的显微硬度双工具的高热量产生和反向旋转有助于更好的颗粒分布，从而获得一致的显微硬度值。因此，该技术为制造的复合材料提供了均匀的机械性能，并且消除了在同一区域进行重复加工的需要，从而大大减少了制造时间和相关成本，使其更适合工业应用。