JMMCE  Vol.10 No.14 , November 2011
Effect of Secondary Processing and Nanoscale Reinforcement on the Mechanical Properties of Al-TiC Composites
ABSTRACT
Aluminium based composites containing 1, 1.5 and 2wt. % of nano-sized Titanium Carbide particulates (TiC), with an average of 45nm, reinforcement were synthesized using low energy planetary ball mill followed by hot extrusion. Microstructural characterization of the materials revealed uniform distribution of reinforcement, grain refinement and the presence of minimal porosity. Properties characterization revealed that the presence of nano-TiC particulates led to an increase in hardness, elastic modulus, 0.2% yield strength (0.2% offset on a stress-strain curve), and the stress at which a material exhibits a specified permanent deformation, Ultimate Tensile Strength (UTS) and ductility of pure aluminum. Fractography studies revealed that the fracture of pure aluminum occurred in ductile mode due to the incorporation and uniform distribution of nano-TiC particulates. An attempt is made in the present study to correlate the effect of nano-sized TiC particulates as reinforcement and processing type with the micro structural and tensile properties of aluminum composites. The mechanical properties, namely, the UTS, hardness, grain size and distribution of the reinforcement in the base metal were studied in as sintered and extruded conditions. Orowan strengthening criteria was used to predict the yield strength of Al-TiC composites in the present work and experimental results were compared with the theoretical results.

Cite this paper
V. Senthilkumar, A. Balaji and H. Ahamed, "Effect of Secondary Processing and Nanoscale Reinforcement on the Mechanical Properties of Al-TiC Composites," Journal of Minerals and Materials Characterization and Engineering, Vol. 10 No. 14, 2011, pp. 1293-1306. doi: 10.4236/jmmce.2011.1014102.
References
[1]   J. M. Torralba, C. E. da Costa, F. Velasco, P/M aluminum matrix composites: an overview, J. Mater. Process. Technol., 133, 203-206 (2003).

[2]   G. Abouelmagd, A.M. Abd El-Mageed, Proceedings of the 5th International Conference on Measurement and Control of Granular Materials, XI AN China, 69–76 (2000).

[3]   K. Tokaji, H. Shiota and K. Kobayashi, Effect of particle size on fatigue behaviour in SiC particulate-reinforced aluminium alloy composites, Fatigue Fract. Eng. Mater. Struct. 22, 281–288 (1999).

[4]   S.J. Zhu, L.M. Peng, Q. Zhou, Z.Y. Ma, K. Kucharova and J. Cadek, Creep behaviour of aluminium strengthened by fine aluminium particles and reinforced by silicon carbide particulates DS Al–SiC/Al4C3 composites, Mater. Sci. Eng. A , 268, 236–245 (1999).

[5]   Hassan SF, Gupta M. Development of high strength magnesium copper based hybrid composites with enhanced tensile properties, Mater. Sci. Technol,19, 253–259 (2003).

[6]   S.F. Hassan and M. Gupta, Development of high strength magnesium copper based hybrid composites with enhanced tensile properties, Composite Structures, 72, 19–26 (2006).

[7]   T. Laha, Y. Chen, D. Lahiri, A. Agarwal, Tensile properties of carbon nanotube reinforced aluminum nanocomposite fabricated by plasma spray forming, Compos. A 40 589-594, (2009).

[8]   A. Santos-Beltrán, V. Gallegos-Orozco, R. Goytia Reyes, M. Miki-Yoshida, I. Estrada-Guel, R. Martínez-Sánchez, Mechanical and microstructural characterization of dispersionstrengthened Al–C system nanocomposites, J. Alloys Compd., 489, 626-630, 2010.

[9]   I. Montealegre Melendez, E. Neubauer, P. Angerer, H. Danninger, J.M. Torralba, Influence of Nano-Reinforcements on the Mechanical Properties and Microstructure of Titanium Matrix Composites, Composites Science and Technology, Accepted Manuscript Available online (2011).

[10]   Zhang and Chen, Contribution of Orowan strengthening effect in particulate-reinforced metal matrix nanocomposites, J. Mater. Sci. 29, 141–50, 1994.

[11]   He L, Allard LF, Ma E., Fe-Cu two-phase nanocomposites: application of a Modified rule of mixtures, Scripta Mater. 42, 517–23, 2000

[12]   Holtz RL, Provenzano V., Bounds on the strength of a Model nanocomposite, Nanostruct . Mater. 8 , 289–300 (1997).

[13]   Lurie S, Belov P, Volkov-Bogorodsky D, Tuchkova N., Nanomechanical modeling of the nanostructures and dispersed composites, Comput. Mater. Sci. 28, 529–539 (2003).

[14]   Zhang and Chen, Consideration of Orowan strengthening effect in particulate-reinforced metal matrix nanocomposites: A model for predicting their yield strength, Scr. Mater. 54, 1321–1326 (2006).

[15]   Gupta M, Lai MO, Saravanaranganathan D, Synthesis, microstructure and properties characterization of disintegrated melt deposited Mg/SiC composites, J. Mater. Sci. 35, 2155-2165 (2000).

[16]   Y. Liu, L.F. Chen, H.P. Tang, C.T. Liu, B. Liu, B.Y. Huang,Design of powder metallurgy titanium alloys and composites, Mater. Sci. Eng. A, 418, 25-35 (2006) .

[17]   Hassan SF, Gupta M, Development of high strength magnesium based composites using elemental nickel particulates as reinforcement, J. Mater. Sci. 37, 2467–2474 ( 2002).

[18]   Tan MJ, Zhang X, Powder Metal Matrix Composites: Selection and Processing, Mater. Sci. Eng. A 244, 80–85 (1998).

[19]   K. Williamson, W.H. Hall, X-ray line broadening from filed aluminium and wolfram, Acta. Metall., 1, 22–31 (1953).

[20]   E.K. Storms, The Refractory carbides, Academic Press, New York, p. 11 (1967).

[21]   Murr LE. Interfacial phenomena in metals and alloys. MA, USA: Addison-Wesley (1975).

[22]   B.V.R.Bhatt, Y.R.Mahajan, H.M.D.Roshan and Y.V.R.K.Prasad, Processing maps and hotworking of powder metallurgy 1100 Al-10 vol % SiC-particulate metal-matrix composite, J.Mater.Sci. 27, 2141-2147 (1992).

[23]   Hazzledine PM, Direct versus indirect dispersion hardening, Scripta Metall. Mater. 26, 57–58 (1992).

[24]   Huang H, Bush MB, Fisher GV, A Numerical Study of Effect of Grain Boundaries on Elastic and Plastic Properties in Nanocomposite Materials, Key Eng Mater. 127–31, 1191–1198 (1997).

[25]   Lilholt H. In: in: Proc of the 4th Riso Int. Symp. on Metall. Mater. Sci. Denmark, Roskilde: Riso National Laboratory; 381–392 (1983).

[26]   Ramakrishnan N, An analytical study on strengthening of particulate reinforced metal matrix composites Acta Mater. 44, 69–77 (1996).

 
 
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