Mechanical and Machining Properties Analysis of Al6061-Cu-Reinforced SiCP Metal Matrix Composite


The metal matrix composite (MMC), despite of its high stiffness, strength, corrosion resistance, wear resistance, non-react with chemicals and so many other tailored qualities which are never obtained in alloy of metals, has limited utilization due to the high cost of fabrication. In this study, a modest attempt has been made to find out the process parameters at which best mechanical properties of Al6061, 4% Cu and reinforced 5% SiCP ceramic MMC can be obtained. The addition of 4% Cu in Al6061 is more or less comparable to the composition duralumin, which are widely used in aerospace applications. SiCP is hard and has linear thermal expansion at high temperature. With reinforcement of SiCP in Al6061-Cu alloy, it can be postulated that hardness of MMC retains at high temperature applications. An analysis of Variance (ANOVA) and linear regression was used for analysis of data with the help of SPSS (Version-17.0). Independent parameters are five levels of pouring rates (1.5 cm/s, 2.0 cm/s, 2.5 cm/s, 3.0 cm/s and 3.5 cm/s), and material type (Al6061 + 4% Cu alloy and Al6061 + 4% Cu, reinforced 5% SiCp MMC processed using stir casting technique) and dependent parameters are hardness and impact strength material removal rates of workpiece. It is found that at different pouring rates material hardness and impact strength of workpiece are highly significant but the material removal rate of workpiece is having no significance value. At pouring rate of 2.5 cm/s and 700℃ ± 5℃ pouring temperature, optimum values of hardness and impact strength are observed as compared to other values of pouring rates (1.5 cm/s, 2.0 cm/s, 3.0 cm/s and 3.5 cm/s). Material Removal rate for work pieces of Al6061 + 4% Cu alloy is less as compared to MMC. So it can be concluded that MMC has better machining ability compared to Al6061 + 4% Cu alloy. Material removal rate of Al6061 + 4% Cu, reinforced 5% SiCP MMC has maximum values at 1.5 cm/s pouring rate compared to 2.0 cm/s, 2.5 cm/s, 3.0 cm/s and 3.5 cm/s pouring rates. With reinforcement of 5% SiC trend of mechanical properties is same, but the hardness and impact strength of MMCs are increased by 25% and 20% respectively. Also it is observed from scanning electron microscopy (SEM) that at pouring rate 2.5 cm/s a better homogeneity can be obtained.

Share and Cite:

Haque, S. , Bharti, P. and Ansari, A. (2014) Mechanical and Machining Properties Analysis of Al6061-Cu-Reinforced SiCP Metal Matrix Composite. Journal of Minerals and Materials Characterization and Engineering, 2, 54-60. doi: 10.4236/jmmce.2014.21009.

Conflicts of Interest

The authors declare no conflicts of interest.


[1] D. B. Miracle, “Metal Matrix Composites—From Science to Technological Significance,” Composite Science Technology, Vol. 65, No. 15-16, 2005, pp. 2526-2540.
[2] R. Ekici, M. K. Apalak and M. Yildirim, “Effects of Random Particle Dispersion and Size on the Indentation Behavior of SiC Particle Reinforced Metal Matrix Composites,” Materials and Design, Vol. 31, No. 6, 2010, pp. 2818-2833.
[3] S. Kumar and V. Balasubramanian, “Effect of Reinforcement Size and Volume Fraction on the Abrasive Wear Behaviour of AA7075Al/SiCp P/M Composites— A Statistical Analysis,” Tribology International, Vol. 43, No. 1-2, 2010, pp. 414-422.
[4] S. M. R. Mousavi Abarghouie and S. M. Seyed Reihani, “Investigation of Friction and Wear Behaviors of 2024 Al and 2024 Al/SiCp Composite at Elevated Temperatures,” Journal of Alloys and Compounds, Vol. 501, No. 2, 2010, pp. 326-332.
[5] D. Bozic, B. Dimcic, O. Dimcic, J. Stasic and V. Rajkovic, “Influence of SiC Particles Distribution on Mechanical Properties and Fracture of DRA Alloys,” Materials and Design, Vol. 31, No. 1, 2010, pp. 134-141.
[6] V. Geaman, “Applications of Isostatic Processing Technology in the field of Duralumin Alloys,” Bulletin of the Transilvania University of Brasov, Vol. 2, No. 51, 2009, pp. 130-134.
[7] S. Naher, D. Brabazon and L. Looney, “Development and Assessment of a New Quick Quench Stir Caster Design for the Production of Metal Matrix Composites,” Journal of Material Process Technology, Vol. 166, No. 3, 2005, pp. 430-439.
[8] T.V. Christy, N. Murugan and S. Kumar, “A Comparative Study on the Microstructures and Mechanical Properties of Al 6061 Alloy and the MMC Al 6061/TiB2/12P,” Journal of Minerals & Materials Characterization & Engineering, Vol. 9, No. 1, 2010, pp. 57-65.
[9] M. Singla, D. D. Dwivedi, L. Singh and V. Chawla, “Development of Aluminium Based Silicon Carbide Particulate Metal Matrix Composite,” Journal of Minerals & Materials Characterization & Engineering, Vol. 8, No. 6, 2009, pp. 455-467.
[10] M. B. Ndaliman and A. P. Pius, “Behavior of Aluminium Alloys Casting under Different Pouring Temperature and Speeds,” Leonardo Electronic Journal of Practices and Technologies, Vol. 6, No. 11, 2007, pp. 71-80.

Copyright © 2022 by authors and Scientific Research Publishing Inc.

Creative Commons License

This work and the related PDF file are licensed under a Creative Commons Attribution 4.0 International License.