Magnesium is reinforced with three different weight percentages (5%, 10% and 15%) of SiC particles (200 mesh size) by stir casting technique to fabricate Mg/SiC_p composites. The Scanning Electron Microscope (SEM) images, micro and macro hardness of three different composites are investigated. The comparison of micro and macro hardness clearly shows that increase in the weight percentage of SiC contributed to increase in hardness. However, uniform dispersion of SiC can be achieved while adding 5% SiC in the composite. Then, the Box Behnken experimental design in response surface methodology is employed for machining 3mm diameter hole in the Mg/SiC_p samples using EDM. The second-order model for Material Removal Rate (MRR) and Tool Wear Rate (TWR) are developed with the influencing parameters of weight percentage of SiC, current, pulse on time and pulse off time. The parameter optimization yields maximum MRR and minimum TWR.

中文翻译：

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使用响应面法优化 Mg/SiCp 复合材料 EDM 的参数

采用搅拌铸造技术，用三种不同重量百分比（5%、10% 和 15%）的 SiC 颗粒（200 目尺寸）增强镁，制备 Mg/SiC _p复合材料。研究了三种不同复合材料的扫描电子显微镜 (SEM) 图像、微观和宏观硬度。微观和宏观硬度的比较清楚地表明，SiC 重量百分比的增加有助于硬度的增加。然而，在复合材料中添加 5% 的 SiC 可以实现 SiC 的均匀分散。然后，采用响应面法中的 Box Behnken 实验设计进行加工 3_{使用 EDM 的 Mg/SiC p}样品中直径 mm 的孔。建立了材料去除率（MRR）和刀具磨损率（TWR）的二阶模型，其中包括碳化硅重量百分比、电流、脉冲开启时间和脉冲关闭时间的影响参数。参数优化产生最大 MRR 和最小 TWR。