Optimization of Machining Parameters on Turning of Hybrid Metal Matrix Composite

Abstract:

Hybrid metal matrix composite constitutes a tough metal matrix with reinforcement of at least two ceramic particulates and exhibit superior mechanical and thermal properties. The difficulties in machining metal matrix composites are obtaining good surface finish, consumption of more electrical power, involving excessive cutting forces and greater tool wear as it contain very hard ceramic particulates. This factor restrict the wide spread application of these kind of materials. Hence the study of machining characteristics and the optimization of the cutting parameters are prime importance. In this paper aluminium alloy is taken as metal matrix and the silicon carbide (SiC 10% by wt.) and boron carbide (B₄C 5% by wt.) taken as ceramic reinforcement. This material is fabricated in the form of cylindrical rod using stir casting method. Turning operations are carried out in medium duty lathe using poly crystalline diamond (PCD) cutting tool insert. Taguchis design of L₀₉ orthogonal array is followed selecting three machining factors namely cutting speed, feed and depth of cut at three levels. Optimal cutting conditions are arrived by Signal-Noise ratio method with respect to surface roughness. The results are validated by (ANOVA) analysis of variance and the percentage of contribution of cutting speed, feed rate and depth of cut for better surface finish are determined and it is found that the vital parameter is feed followed by cutting speed and then by depth of cut.

• Periodical: Applied Mechanics and Materials (Volume 315)
• Pages: 113-116
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.315.113
• Online since: April 2013
• Authors: T.S. Mahesh Babu, P.S. Ramkumar, Nambi Muthukrishnan
• Keywords: ANOVA, PCD, S/N Ratio, Surface Roughness (SR), Taguchis Design, Turning

References

[1] C.T. Lane, Requirements for Machining MMC Castings, Trans. AFS, Vol 101, 1993, Vol 8(5) Oct 1999 pp.525-529.

[2] P.K. Rohatgi, Future Directions in Solidification of Metal Matrix Composites, Key Engineering Materials, G.M. Newaz et al., Ed., Trans. Tech., Switzerland, Vol 104-107, 1995, pp.293-312.

DOI: 10.4028/www.scientific.net/kem.104-107.293

[3] D.J. Lloyd, Particle Reinforced Aluminium and Magnesium Matrix Composites, Int. Mater. Rev., Vol 39, 1994, pp.1-23.

[4] J.E. Allison and G.S. Cole, Metal Matrix Composites in the Automotive Industries, J. Met., Vol 45 (No. 4), 1993, pp.10-15.

[5] L.M. Orsborn and G.R. Shook, Machining Experience with Discontinuously Reinforced, Proc. Sym. on Machining of Composite Materials (Chicago, IL), 1-5 Nov 1992, pp.57-61.

[6] B.H. Yan and C.C. Wang, Machinability of SiC Particle Reinforced Aluminium Alloy Composite Material, J. Jpn. Inst. Light Met., Vol 43 (No. 4), 1993, pp.187-192.

[7] A. Jawaid, S. Barnes, and S.R. Ghadimzadeh, Drilling of Particulate Aluminium Silicon Carbide Metal Matrix Composites, Proc. Sym. on Machining of Composite Materials (Chicago, IL), 1-5 Nov 1992, pp.35-47.

[8] C. Lane, Machinability of Aluminium Composites as a Function of Matrix Alloy and Heat Treatment, Proc. Sym. on Machining of Composite Materials, 1-5 Nov 1992, pp.3-15.

[9] C. Lane, The Effect of Different Reinforcements on PCD ToolLife of Aluminium Composites, Proc. Sym. on Machining of Composite Materials, 1-5 Nov 1992, pp.17-27.

[10] P. Chen, High Performance Machining of SiC Whisker Reinforced Aluminium Composite by Self Propelled Rotary Tools, CIRP Ann. Vol 41, 1992, pp.59-62.

DOI: 10.1016/s0007-8506(07)61152-4

[11] K. Palanikumar, Application of Taguchi and response surface methodologies for surface roughness in machining glass fiber reinforced plastics by PCD tooling, Trans. AFS, Vol 101, 1993, pp.525-529 Vol 8(5) October (1999).

DOI: 10.1007/s00170-006-0811-0