Cost effective machining of hybrid metal matrix composites (HMMC’s) with required surface integrity and without surface flaws is a challenging task for modern industries. This research explores the effect of end milling factors (spindle speed, feed rate, and depth of cut) and also weight percentage of reinforced materials on the surface integrity (surface roughness and microhardness) and material removal rate during machining of hybrid Al7075/SiC/Gr composites. Response surface methodology (RSM) is selected for experimental design and experimental results are analyzed using analysis of variance (ANOVA). Further, multi-objective optimization is carried out using composite desirability function. In addition, the morphology of the milled surfaces is examined for defining the flaws that affect quality of the milled surfaces. The experimental results reveal that apart from spindle speed and feed rate, the weight percentage of reinforced materials significantly affects the surface integrity of hybrid Al7075/SiC/Gr composites. The obtained optimum levels of the factors are spindle speed at 1000 rpm, feed rate at 0.0677 mm/rev, depth of cut at 1.1869 mm, and weight percentage of reinforced materials at 12.6970% that produce optimal values of the considered responses i.e. material removal rate up to 2043 mm³/min, roughness up to 1.29 μm and microhardness up to 142.36 μH.

具有所需表面完整性且无表面缺陷的，具有成本效益的混合金属基复合材料（HMMC）加工对于现代工业而言是一项艰巨的任务。这项研究探索了铣削Al7075 / SiC / SiC混合材料时端铣刀因子（主轴转速，进给速率和切削深度）以及增强材料的重量百分比对表面完整性（表面粗糙度和显微硬度）和材料去除率的影响。 Gr复合材料。选择响应面方法（RSM）进行实验设计，并使用方差分析（ANOVA）分析实验结果。此外，使用合成期望函数执行多目标优化。另外，检查铣削表面的形态以定义影响铣削表面质量的缺陷。实验结果表明，除了主轴转速和进给速度外，增强材料的重量百分比还显着影响混合Al7075 / SiC / Gr复合材料的表面完整性。获得的最佳因素水平是主轴转速（1000 rpm），进给速度（0.0677 mm / rev），切削深度（1.1869 mm）和增强材料的重量百分比（12.6970％），这些参数可得出考虑的响应的最佳值，即材料去除率高达2043毫米³ / min，粗糙度最高1.29μm，显微硬度最高142.36μH。