MSA  Vol.3 No.11 , November 2012
Dynamic Behaviour of Cast A356/Al2O3 Aluminum Metal Matrix Nanocomposites
ABSTRACT
The present work includes the study of the dynamic properties of the nanocomposites specimens. The dynamic properties of A356/Al2O3 nanocomposites were investigated through different fabrication conditions. The A356/Al2O3 nanocomposites specimens were fabricated using a combination between the rheocasting and squeeze casting routes. The composites were reinforced with Al2O3 particulates of 60 and 200 nm and different volume fractions up to 5 vol.%. The dynamic properties of the A356/Al2O3 nanocomposites were investigated through measuring the dynamic properties of specimens. Free vibration method is used to measure frequency response (fn ), and damping factor (ξ). The viscoelastic properties such as loss factor η, storage modulus (E'), and loss modulus (E") were obtained. The results concluded that, the dynamic properties of nanocomposites were improved by increasing the volume fractions of nanoparticulates and decreasing the nanoparticulates size. The results indicated also that, the damping factor, and the related parameters (η, E' and E") was strongly affected by increasing both volume fraction and the particulates.

Cite this paper
E. El-Kady, T. Mahmoud, A. El-Betar and M. Abdel-Aziz, "Dynamic Behaviour of Cast A356/Al2O3 Aluminum Metal Matrix Nanocomposites," Materials Sciences and Applications, Vol. 3 No. 11, 2012, pp. 815-820. doi: 10.4236/msa.2012.311118.
References
[1]   ASM Handbook, “Composites,” Vol. 21, 2001.

[2]   D. Zhang and D. Jia, “Toughness and Strength Improvement of Diglycidyl Ether of Bisphenol-A by Low Viscosity Liquid Hyperbranched Epoxy Resin,” Journal of Applied Polymer Science, Vol. 101, 2006, pp. 2504-2511. doi:10.1002/app.23760

[3]   R. C. Cabanelas, B. Serrano and I. Baselga, “Development of Co Continuous Morphologies in Initially Heterogeneous Thermosets Blended with Poly(Methyl methacrylate),” Macromolecules, Vol. 38, 2006, pp. 961-970. doi:10.1021/ma0487352

[4]   M. Colakoglu, “Factors Effecting Internal Damping in Aluminum,” Theory of Applied Mechanics, Vol. 42, 2004, pp. 95-105.

[5]   I. S. El-Mahallawi, K. Eigenfield, F. Kouta, A. Hussein, T. S. Mahmoud, R. M. Ragaie, A. Y. Shash and W. Abou-Al-Hassan, “Synthesis and Characterization of New Cast A356/( Al2O)p Metal Matrix Nanocomposites,” The Proceeding of the ASME 2nd Multifunctional Nanocomposites & Nanomaterials: International Conference & Exhibition, Cairo, 11-13 January 2008.

[6]   Y. Yang, J. Lan and X. C. Li, “Study on Bulk Aluminum Matrix Nanocomposite Fabricated by Ultrasonic Dispersion of Nano-Sized SiC Particles in Molten Aluminum Alloy,” Materials Science & Engineering A, Vol. 380, 2004, pp. 378-383. doi:10.1016/j.msea.2004.03.073

[7]   X. L. Zhong, W. L. E. Wong and M. Gupta, “Enhancing Strength and Ductility of Magnesium by Integrating it with Aluminum Nanoparticles,” Acta Materialia, Vol. 55, 2007, pp. 6338-6344. doi:10.1016/j.actamat.2007.07.039

[8]   E. Y. El-Kady, T. S. Mahmoud and A. A. Ali, “On the Electrical and Thermal Conductivities of Cast A356/ Al2O Metal Matrix Nanocomposites,” Materials Sciences and Applications, Vol. 2, 2011, pp. 1180-1187. doi:10.4236/msa.2011.29159

[9]   E. Y. El-Kady, T. S. Mahmoud and M. Abdel-Aziz Sayed, “Elevated Temperatures Tensile Characteristics of Cast A356/ Al2O Nanocomposites Fabricated Using a Combination of Rheocasting and Squeeze Casting Techniques,” Materials Sciences and Applications, Vol. 2, 2011, pp. 390-398. doi:10.4236/msa.2011.25050

[10]   C. F. Deng, D. Z. Wang, X. X. Zhang and Y. X. Ma, “Damping Characteristics of Carbon Nan Tube Reinforced Aluminum Composite,” Materials Letters, Vol. 61, 2007, pp. 3229-3231. doi:10.1016/j.matlet.2006.11.073

 
 
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