Abstract In this study, MMC materials were produced by stir casting method using AA7075 alloy matrix and silicon carbide (SiC) as reinforcement elements in order to investigate the effect of die-sinking electric discharge machining (EDM) process parameters for various weight percentage reinforcement (10% 14% and 18%) used MMC. EDM with three different pulse-on time (Time on) (25, 50 &75 µs) and discharge current value (2, 4 & 6 Amperes) and at constant dwell time (20 µs) and depth of cut (0.5 mm). After machining process, the effects of process parameters on processing time, average surface roughness, hole diameter and the weight loss were investigated. As a result of the study, highest values, the lowest values of processing time, hole diameter and average surface roughness were obtained for various weight percentage reinforcement MMC respectively. Ideal MMC, discharge current value and time-on duration for average surface roughness, hole diameter, processing time and material wear loss according to signal to noise ratio were determined. According to ANOVA results, R2 values for the average surface roughness, hole diameter, processing time and material wear loss were calculated as 89.55%, 98.46%, 89.85% and 24.06% respectively.

中文翻译：

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在电火花成型机中用熔融金属搅拌和常规铸造技术生产碳化硅增强MMC材料的可加工性研究

摘要 本研究以 AA7075 合金基体和碳化硅 (SiC) 作为增强元素，采用搅拌铸造法生产 MMC 材料，以研究电火花加工 (EDM) 工艺参数对不同重量百分比增强材料的影响。 10%、14% 和 18%）使用 MMC。EDM 具有三种不同的脉冲开启时间 (Time on)（25、50 和 75 微秒）和放电电流值（2、4 和 6 安培）以及恒定驻留时间 (20 微秒) 和切削深度 (0.5 毫米)。加工后，研究了工艺参数对加工时间、平均表面粗糙度、孔径和失重的影响。作为研究的结果，处理时间的最高值、最低值，分别获得了不同重量百分比增强 MMC 的孔径和平均表面粗糙度。根据信噪比确定了理想的 MMC、放电电流值和平均表面粗糙度、孔径、加工时间和材料磨损损失的持续时间。根据方差分析结果，平均表面粗糙度、孔径、加工时间和材料磨损损失的 R2 值分别计算为 89.55%、98.46%、89.85% 和 24.06%。