Investigating the electrical discharge machining (EDM) parameter effects on Al-Mg2Si metal matrix composite (MMC) for high material removal rate (MRR) and less EWR–RSM approach
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- 作者：Mehdi Hourmand ; Saeed Farahany…
- 关键词：Metal matrix composite (MMC) ; Electrical discharge machining (EDM) ; Response surface methodology (RSM) ; Material removal rate (MRR) ; Electrode wear ratio (EWR) ; Microstructure
- 刊名：The International Journal of Advanced Manufacturing Technology
- 出版年：2015
- 出版时间：March 2015
- 年：2015
- 卷：77
- 期：5-8
- 页码：831-838
- 全文大小：3,194 KB
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- 刊物主题：Industrial and Production Engineering
Production and Logistics
Mechanical Engineering
Computer-Aided Engineering and Design- 出版者：Springer London
- ISSN：1433-3015
文摘
Al-Mg2Si composite is a new group of metal matrix composites (MMCs). Electrical discharge machining (EDM) is a nonconventional machining process for machining electrically conductive materials regardless of hardness, strength and temperature resistance, complex shapes, fine surface finish/textures and accurate dimensions. A copper electrode and oil-based dielectric fluid mixed with aluminum powder were used. The polarity of electrode was positive. Response surface methodology (RSM) was used to analyze EDM of this composite material. This research illustrates the effect of input variables (voltage, current, pulse ON time, and duty factor) on material removal rate (MRR), electrode wear ratio (EWR), and microstructure changes. The results show that voltage, current, two-level interaction of voltage and current, two-level interaction of current and pulse ON time, and the second-order effect of voltage are the most significant factors on MRR. Pulses ON time and second-order effect of pulse ON time are the most significant factors affecting EWR. Microstructure analysis of EDM on Al-Mg2Si samples revealed that voltage, current, and pulse ON time have a significant effect on the profile and microstructure of machined surfaced.