Forgeability and Machinability of Stir Cast Aluminum Alloy Metal Matrix Composites
- 1 Department of mechanical Engineering, Jadavpur University, West Bengal, India
- 2 Department of mechanical Engineering, Jadavpur University, West Bengal, India
- 3 Department of mechanical Engineering, Bengal Engineering College, West Bengal, India
- 4 Department of mechanical Engineering, Jadavpur University, Kolkata, West Bengal, India
Abstract
In the present paper, the aluminum alloy i.e. LM6 based composites reinforced with different weight fraction of SiC particles was produced by stir cast technique and the effect of reinforced ratios on the forgeability and the machinability was examined. The test results show that the increment in weight fraction of reinforcement particles in the matrix metal produced better mechanical property like hardness but the forgeability of the cast MMCs decreases. The forgeability of the as cast MMCs were also varied with the change in thickness of the casting. The results show that the forgeability of cast metal matrix composites at the mid section of the casting is minimum compared to both end section of a three-step casting. The effect of machining parameters, e.g. cutting speed and depth of cut on the surface roughness and cutting forces at constant feed rate was investigated during experimentation. The results show that higher weight percentage of SiCp reinforcement produced a higher surface roughness and needs higher cutting forces during machining operation. It has also observed that the depth of cut and the cutting speed at constant feed rate affected the surface roughness and the cutting forces. This practical research analysis and test results on the forgeability and machinability of Al/SiC-MMC will provide useful guidelines to the present day manufacturing engineers.
- Pramanik, A., Zhang, L.C. and Arsecularatne, J.A., “Prediction of cutting forces in machining of metal matrix composites”, International Journal of Machine Tools and Manufacture, 46 (2006), pp.1795–1803.
- Rohatgi, P., “Advances in cast MMCs”, Adv. Mater. Process, 2(1990), pp. 38–44.
- Allison, JE and Cole, GS, “Metal matrix composite in the automotive industry: Opportunities and Challenges”, JOM January: (1993), pp.19–24.
- Ismail Oè zdemir, Uè mit Coè cen and Kazim Oè nel, “The effect of forging on the properties of particulate-SiC- reinforced aluminium-alloy composites”, Composites Science and Technology, 60(2000),pp. 411-419.
- Ceschinia, L., Minakb, G., Morria, A. and Tarterini , F.,“Forging of the AA6061/23 vol.%Al2O3p composite: Effects on microstructure and tensile properties”, Materials Science and Engineering A , 513–514,pp.176–184.
- Ceschinia, L., Minakb, G. and Morri, A., “Forging of the AA2618/20 vol.% Al2O3p composite: Effects on microstructure and tensile properties”, Composites Science and Technology ,69(2009) pp.1783–1789.
- He, W., Zhang, Y.F., Lee, K.S., Lu, L., Xie, S.S. and Jin, Q.J., “Microstructure and mechanical properties of an Al/SiCp, composite cold die forged gear.” Materials & Design.17(2), (1996),pp. 97-102.
- Cronjager, L. and Meister, D., “Machining of fibre and particle reinforced aluminium”. Ann CIRP 41(1) (1992),pp.63–66.
- Loony, LA., Monaghan, JM.,Reilly, P O. and Toplin, DRP., “The turning of an Al/SiC metal matrix Composite”. J Mater Process Technol, 33(4) (1992),pp. 453–468.
- Weinert, K. and Konig, W. “A consideration of tool wear mechanism metal matrix composite (MMC)”. Ann CIRP 42(1) (1993),pp.95–98.
- Gallab, El. and Sklad, M.. “Machining of Al/SiC particulate metal-matrix composites. Part I. Workpiece surface integrity”, J.Mater. Process. Technol. 83(1998a), pp. 277–285.
- Ejiofor, J.U. and Reddy, R.G., “Developments in the processing and properties of particulate Al–Si composites”, J. Mater. Soc.,79(1997), pp.31–34.
- Gallab, El. and Sklad, M., “Machining of Al/SiC particulate metal-matrix composites. Part I. Tool performance”, J. Mater.Process. Technol., 83(1998b), pp.151–158.
- Gallab, El. and Sklad, M., “Machining of Al/SiC particulate metal-matrix composites. Part III.Comprehensive tool wear models”, J.Mater. Process. Technol., 10(2000),pp.10–20.