Experimental Studies on Wire Electric Discharge Cutting of SiCp/6061 Aluminum Metal Matrix Composites

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This paper reports about the experimental findings on the wire electric discharge cutting (WEDC) of 6061 aluminum metal matrix composite (MMC) reinforced with silicon carbide particulates (i.e. SiCp/6061 Al). Four WEDC parameters namely servo voltage, pulse-on time, pulse-off time and wire feed rate were varied to study their effect on the quality of cut in SiCp/6061 aluminum MMC using average cutting rate and microstructure of the cut surface as response parameters. The experiments were conducted using one-factor-at-a-time experiment strategy in which only one input parameter was varied while keeping all other input parameters as constant. The experimental results indicate that the average cutting speed is mainly affected by pulse-on time, pulse-off time, and voltage and the changes are more prominent for the MMC 7.5% SiCp. The characteristics of the surface produced by WEDC were analyzed by scanning electron microscopy (SEM). Analysis of SEM images of the cut surface has revealed that the depth of micro-voids and micro-cracks slightly increases as the voltage and pulse-on time increases and as pulse-off time and wire feed rate decreases. there seems to be trade-off between the average cutting speed and better quality of cut for Al-SiCp MMC as far the values of pulse-on time, pulse-off time are considered and final choice will depend upon the type of application. An optimum range of the input parameters has been bracketed as the final outcome of this work for carrying out further research to develop the models for WEDC of SiCp/6061 aluminum MMC and to optimize the WEDC parameters for the best quality of cut and to minimize the wire breakage frequency.

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Periodical:

Edited by:

Daizhong Su, Qingbin Zhang and Shifan Zhu

Pages:

173-176

DOI:

10.4028/www.scientific.net/KEM.450.173

Citation:

P. Shandilya et al., "Experimental Studies on Wire Electric Discharge Cutting of SiCp/6061 Aluminum Metal Matrix Composites", Key Engineering Materials, Vol. 450, pp. 173-176, 2011

Online since:

November 2010

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$35.00

[1] V.K. Lindroos and MJ Talvitie: Recent advances in metal matrix composites, Journal of Materials Processing Technology, Vol. 53 (1995), pp.273-284.

DOI: 10.1016/0924-0136(95)01985-n

[2] M.A. Taha: Practicalization of cast metal matrix composites (MMCs), Mater Des, Vol. 22 (2001), pp.431-441.

[3] M. Rosso: Ceramic and metal matrix composites: routes and properties, Journal of Materials Processing Technology, Vol. 175 (2006), pp.364-375.

DOI: 10.1016/j.jmatprotec.2005.04.038

[4] D.B. Miracle: Metal matrix composites-from science to technological significance. Composite Science and Technology, Vol. 65 (2005), pp.2526-2540.

DOI: 10.1016/j.compscitech.2005.05.027

[5] B.H. Yan and C.C. Wang: Machinability of SiC particle reinforced aluminum alloy composite material, Journal of Japan Institute Light Metals, Vol. 43 (4) (1993), pp.187-192.

DOI: 10.2464/jilm.43.187

[6] J.M. Monaghan and P. O Reilly: The drilling of an Al/SiC Metal matrix composite, Journal of Materials Processing Technology, Vol. 33 (4) (1992) pp.469-480.

DOI: 10.1016/0924-0136(92)90280-6

[7] F. Muller and J. Monaghan: Non- conventional machining particle metal matrix composite, International Journal of Machine tool and Manufacture, Vol. 40 (9) (2000) pp.1351-1366.

DOI: 10.1016/s0890-6955(99)00121-2

[8] A. Grabowski, M. Nowak and J. Sleziona; Laser cutting of an Al Si alloy/ SiCp composites theory and experiments. Journal of Achievements in Materials and Manufacturing Engg. Vol. 17 (12) (2006) pp.61-64.

[9] N.G. Patil and P.K. Brahmankar: Some investigations into wire electro-discharge machining performance of Al/SiCp composites, Int. Journal of Machining and Machinability of Materials, Vol. 1 (4) (2006), pp.412-431.

DOI: 10.1504/ijmmm.2006.012350

[10] P. saha, D. Tarafdar, S. K. Pal: Modeling of wire-electro-discharge machining of TiC/Fe in situ metal matrix composite using normalized RBFN with enhanced K means clustering technique, Int. Journal of Advanced Manufacturing Technology, Vol. 43 (2009).

DOI: 10.1007/s00170-008-1679-y

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