Effect of Particle Volume Fraction on the Tensile Properties of Composite Al6061/SiC Materials by Hot Extrusion

Subject Areas : Journal of Simulation and Analysis of Novel Technologies in Mechanical Engineering

محمد رضا ستاری ¹ , محمد رنجبران ²

1 - دانشجوی کارشناسی ارشد مهندسی متالورژی و مواد دانشگاه تربیت دبیر شهید رجایی تهران
2 - استادیار دانشکده مهندسی متالورژی و مواد دانشگاه تربیت دبیر شهید رجایی تهران

Received: 2015-09-28 Accepted : 2015-09-28 Published : 2012-06-21

Keywords: Aluminium Matrix Composite, Silicon Carbide Particle, Extrusion Process, Porosity, Tensile Properties,

Abstract :

In the present study the effect of phase volume fraction on the reinforcement of microstructure and tensile properties of composite extrusion process Al6061/SiC has been studied. For this purpose, the base alloy Al6061 using pure aluminum ingots, silicon, of Al-50% Mg, Al-10% Cr and a thin copper rod was prepared. Next, the composite Al6061/5% SiC, Al6061/10% SiC, Al6061/15% SiC and Al6061/20% SiC through the addition of various amounts of silicon carbide particles was prepared by cast stirring. For composite samples containing different volume fractions of the reinforced SiC, hot extrusion operation was performed. Evaluation of microstructure using light and electron microscope was performed. During the study, it was observed that with the increasing amount of reinforcement, porosity and pores in the microstructure was increased. The extrusion process reduces the amount of porosity as well as creating fine reinforcement. In order to investigate the effect of extrusion process on the mechanical properties of the composite, tensile test were used. Results showed that, with increasing SiC weight to 5 percent, it will increase ultimate tensile strength of the composite. In addition, it is shown that the extrusion process will result a homogenous particles distribution which in turn will improve the tensile stress.

References:

[1] Miracle D.B., “Metal matrix composites- From science to technological significance, Composites Science and Technology, vol. 65, 2005, pp. 2526-2540.

[2] Matthews F.L., Rawlings R.D., “Composite Materials: Engineering and Science”, 2009, London, Chapman & Hall.

[3] Callister W.D., “Materials Science and Engineering: An Introduction”, Wiley Asiua Student, 2008, USA, Chapman & Hall.

[4] Taha M.A., “Practicalization of Cast Metal Matrix Composites (MMCCs)”, Materials and Design, vol. 22(6), 2001, pp. 431-441.

[5] Allison J.E., Cole. G.S., “Metal-Matrix Composites in the Automotive Industry: Opportunities and Challenges”, JOM, vol. 45(1), 1993, pp. 19-24.

[6] Srivatsan T.S., Ibrahim I.A., Mohamed F.A., Lavernia E.J., “Processing Techniques for Particulate Reinforced Metal Aluminum Matrix Composites”, Journal of Materials Science, vol. 26(22), 1991, pp. 5965- 5978.

[7] Clegg A., “Squeeze Casting, A New Process Technology for the Engineer”, Foundry Trade Journal, vol. 166(354), 1993, pp. 484-485.

[8] Wua Y., Kim G.Y., Anderson I.E., Lograsso T.A., “Fabrication of Al6061 composite with high SiC particle loading by semi-solid powder processing”, vol. 58(13), 2010, pp. 4398-4405.

[9] Verma S.K., Fishman S.G., “Manufacturing of Composites by Squeeze Casting”, Proceeding of the International Symposium on Advances in Cast Reinforced Metal Composites, Chicago, Illinois, USA, 1988, pp. 24-30

[10] Cöcen Ü., Önel K., “Ductility and strength of extruded SiCp/aluminum-alloy composites”, Composites Science and Technology, vol. 62(12), 2002, pp. 275-282