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HomeMaterials Science ForumMaterials Science Forum Vol. 765Study of Mechanical Properties of an LM24...

Study of Mechanical Properties of an LM24 Composite Alloy Reinforced with Cu-CNT Nanofillers, Processed Using Ultrasonic Cavitation

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Abstract:

This study investigates the effect of Cu-Carbon Nanotube (Cu-CNT´s) composite powders on the mechanical properties of an Al-Si9.5-Cu4-Fe1.3 wt.% (LM24) aluminium matrix composite (AMC). Carbon nanotubes (CNT’s) can exhibit exceptional mechanical properties, e.g. stiffness up to 1000 GPa and strength in the order of 100 GPa. In recent years there has been significant scientific interest in improving properties in conventional alloys, via fabricating CNT metal matrix composites in order to attempt to harness their extraordinary attributes. In this study mechanically alloyed Cu-CNTS powders were added to molten LM24. The melt was processed using ultrasonic cavitation and subsequently high pressure die casting to form as-cast tensile specimens. SEM results indicate that CNT’s can be successfully introduced into the melt using this method. Compared to the unreinforced alloy, the CNT additions resulted in an increment (~20±10 MPa) to both ultimate tensile strength and yield strength, with a corresponding decline (~1±0.5l %) in elongation. This observed increase in strengthening may be attributed to the CNT’s pinning and hindering both grain boundary and dislocation migration during applied loading. Interestingly, no significant difference in properties were found with an increase in the CNT content (from 0.05 to 0.1 wt.%) potentially indicating a saturation limit.

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Light Metals Technology 2013

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Periodical:

Materials Science Forum (Volume 765)

Pages:

245-249

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.765.245

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Online since:

July 2013

Authors:

Alberto Miranda, Noe Alba-Baena, Brian J. McKay, Dmitry G. Eskin, Se Hyun Ko, J.S. Shin

Keywords:

Aluminum (Al), CNT's, Mechanical Property, Nanocomposite, Nanofiller, Ultrasonic Cavitation

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[1] R. Bacon, Growth, Structure, and Properties of Graphite Whiskers, J. Appl. Phys. 31 (1960) 283-290.

[2] S. Iijima, Helical Microtubules of Graphitic Carbon, Nature 354 (1991) 56-58.

DOI: 10.1038/354056a0

[3] S.R. Bakshi, D. Lahiri, A. Agarwal, Carbon Nanotube Reinforced Metal Matrix Composites – A Review, Int. Mater. Rev. 55 (2010).

[4] M.M.J. Treacy, T.W. Ebbesen, J.M. Gibson, Nature 381 (1996) 678–680.

[5] A. Krishnan, E. Dujardin, T.W. Ebbesen, P.N. Yianilos, M.M.J. Treacy, Phys. Rev. B 58 (1998) 14013-14019.

DOI: 10.1103/physrevb.58.14013

[6] E.W. Wong, P.E. Sheehan, C.M. Lieber, Science 277 (1997) 1971-1974.

[7] M.F. Yu, B.S. Files, S. Arepalli, R.S. Ruoff, Phys. Rev. Letts. 84 (2000) 5552-5555.

[8] E. Neubauer, M. Kitzmantel, M. Hulman, P. Angerer, Potential and challenges of metal-matrix-composites reinforced with carbon nanofibers and carbon nanotubes, Composites Sci. Technol. 70 (2010) 2228-2236.

DOI: 10.1016/j.compscitech.2010.09.003

[9] S. Donthamsetty, N.R. Damera, P.K. Jain, Ultrasonic Cavitation Assisted Fabrication and Characterization of A356 Metal Matrix Nanocomposite Reinforced with SiC, B4C, CNTs, AIJSTPME 2 (2009) 27-34.

[10] N. Barekar, S. Tzamtzis, B.K. Dhindaw, J. Patel, N. Hari Babu, Z. Fan, Processsing of Al-Graphite Particulate Metal Matrix Composites by Advanced Shear Technology, J. Eng. and Perform. (2009).

DOI: 10.1007/s11665-009-9362-5

[11] P.K. Rohatgi, B. Schultz, Lightweight Metal Matrix Nanocomposites, Stretching the Boundaries of Metals, Material Matters 2.4 (2007) 16.

[12] A.M.K. Esawi, K. Morsi, A. Sayed, M. Taher, S. Lanka, Effect of Carbon Nanotube (CNT) Content on the Mechanical Properties of CNT-Reinforced Aluminium Composites, Composites Sci. Technol. 70 (2010) 2237-2241

DOI: 10.1016/j.compscitech.2010.05.004

[13] F. Wang, S. Arai , M. Endo, The Preparation of Multi-Walled Carbon Nanotubes with Ni-P Coating by an Electroless Deposition Process, Carbon 43 (2005) 1716-1721.

DOI: 10.1016/j.carbon.2005.02.015

[14] K.C. Chin, A. Gohel , W.Z. Chen, H.I Elim, W. Ji, G.L Chong, et al. Gold and silver decorated carbon nanotubes: an improved broad-band optical limiter, Chem. Phys. Letts. 409 (2005) 85-8.

DOI: 10.1016/j.cplett.2005.04.092

[15] F.Z. Kong, X.B. Zhang, W.Q Xiong, F. Liu , W.Z. Huang , Y.L Sun, J.P Tu, Y.W. Chen, Surf. Coat. Technol. 105 (2002) 33-36.

[16] Y. Yang, X. Li, Ultrasonic Cavitation Based Nanomanufacturing of Bulk Aluminum Matrix Nanocomposites, J. Manuf. Sci. Eng. 129 (2007) 497-501.

DOI: 10.1115/1.2714583

[17] G. Cao, H. Choi, H. Konishi, S. Kou, R. Lakes, X. Li, Mg–6Zn/1.5%SiC nanocomposites fabricated by ultrasonic cavitation-based solidification processing, J. Mater. Sci. 43 (2008) 5521-5526.

DOI: 10.1007/s10853-008-2785-9

[18] Information on: http://www.alumasc-precision.co.uk/AlloyLM24.php