Friction stir processing is a technique for the modification and fabrication of surface composites. Surface composites of aluminium have a diverse application in industries like aerospace and automobile. Here, B₄C nano-particles (< 30 nm) have been employed as the reinforcement on AA7075 based substrate alloy and surface composites have been constructed at varying Tool rotation and Tool traverse speeds. The influence of these varying factors on the ultimate tensile strength (UTS), microhardness (Hv) and residual stress (RS) have been studied. Taguchi L9 orthogonal array was used for the DOE and the changes in the mechanical properties of these nine samples with regards to the tool rotation speeds of 800 rpm, 1000 rpm and 1200 rpm and the tool traverse speeds of 40 mm min⁻¹, 50 mm min⁻¹ and 60 mm min⁻¹ were investigated. It was found that between the two processing variables, Tool traverse speed was the more significant variable. 800 rpm and 60 mm min⁻¹ were determined to be the optimum parameters for Friction stir processing and the predicted values of microhardness (Hv) through Taguchi analysis were the most accurate.

摩擦搅拌加工是一种用于表面复合材料改性和制造的技术。铝的表面复合材料在航空航天和汽车等行业有着广泛的应用。在此，B ₄ C 纳米颗粒（< 30 nm）已被用作AA7075 基基体合金的增强材料，并以不同的工具旋转和工具移动速度构建表面复合材料。研究了这些不同因素对极限抗拉强度 (UTS)、显微硬度 (Hv) 和残余应力 (RS) 的影响。田口 L9 正交阵列用于 DOE 和这九个样品的机械性能在 800 rpm、1000 rpm 和 1200 rpm 的工具转速以及 40 mm min ^-1、50 mm的工具横移速度方面的变化分钟^-1和60 mm min ^-1进行了研究。发现在两个加工变量之间，刀具移动速度是更显着的变量。800 rpm 和60 mm min ^-1被确定为摩擦搅​​拌加工的最佳参数，通过田口分析得出的显微硬度(Hv) 预测值是最准确的。