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Influence of Hot Extrusion Process on the Mechanical Behavior of AA6061/SIC Composites

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Abstract:

The effect of hot extrusion process on the microstructure, mechanical properties and fracture behavior of metal-matrix composites (MMCs) of AA6061 alloy reinforced with 10 volume percent particulate SiC with the average size of 46 µm was studied. The MMC ingots were fabricated by the stir casting method and were extruded at 450°C at a ram speed of 1mm/s and at the extrusion ratios of 6:1, 12:1 and 18:1. Various techniques including metallography, density measurement, tensile testing, and SEM fractography were utilized to characterize the mechanical behavior of the MMCs. Results demonstrated that extruded composites possessed considerably lower porosity contents, higher strength, and enhanced ductility in comparison with the as-cast samples. In addition, further improvement in the mechanical properties of the extruded composites was noticed by increasing the extrusion ratio. Fractographic observations revealed that the brittle fracture behavior of the as-cast specimens was promoted by cracking of the large SiC particle clusters. Whereas, the fracture surfaces of extruded composites showed extensive tear ridge formation by initiation and growth of shallow dimples, around the cracked particles, which is characteristic of a ductile fracture process. This change in the fracture behavior and improvement in mechanical properties is attributed to the break up of particle clusters and diminishment of pores during the extrusion process.

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Periodical:

Advanced Materials Research (Volumes 264-265)

Pages:

141-148

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.264-265.141

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Online since:

June 2011

Authors:

Amir Pakdel, Hassan Farhangi, Masoud Emamy

Keywords:

Fracture, Hot Extrusion, Metal Matrix Composite (MMC)

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© 2011 Trans Tech Publications Ltd. All Rights Reserved

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References

[1] S.V. Nair and J.K. Tien, Int. Met. Rev. Vol. 30 (1985), 275-288.

Google Scholar

[2] J.W. Kaczmar, K. Pietrzak and W. Wlosinski, J. Mater. Process. Tech. Vol. 106 (2000), 58-67.

Google Scholar

[3] D.B. Miracle, Compos. Sci. Technol. Vol. 65 (2005), 2526-2540.

Google Scholar

[4] S. Suresh, A. Mortensen and A. Needleman: Fundamentals of metal matrix composites, (Butterworth-Heinemann, 1993).

Google Scholar

[5] Y. Sahina and M. Acılar, Composites: Part A, Vol. 34 (2003), 709–718.

Google Scholar

[6] K. Konopka and M. Szafran, J. Mater. Process. Tech. Vol. 175 (2006), 266-270.

Google Scholar

[7] Abd-Elwahed M. Assar, J. Mater. Process. Tech. Vol. 86 (1999), 152–158.

Google Scholar

[8] J. Hashim, L. Looney and M.S.J. Hashmi, J. Mater. Process. Tech. Vol. 92-93 (1999), 1-7.

Google Scholar

[9] D.M. Skibo, D.M. Schuster and L. Jolla, US Patent No. 4-786-467, (1988).

Google Scholar

[10] S.B. Prabu, S. Kathiresan and B. Mohan, J. Mater. Process. Tech. Vol. 171 (2006), 268-273.

Google Scholar

[11] A.M. Samuel, A. Gotmare, F.H. Samuel, Compos. Sci. Technol. Vol. 53 (1995), 301-315.

Google Scholar

[12] H. Nakae and S. Wu, Mat. Sci. Eng. A, Vol. 252 (1998), 232–238.

Google Scholar

[13] J. Hashim, L. Looney and M.S.J. Hashmi, J. Mater. Process. Tech. Vol. 119 (2001), 324-328.

Google Scholar

[14] J.C. Lee, J.P. Ahn, J.H. Shim, Z. Shi and H.I. Lee, Scripta Mater. Vol. 41 (1999), No. 8, 895–900.

Google Scholar

[15] J. Hashim, L. Looney and M.S.J. Hashmi, J. Mater. Process. Tech. Vol. 123 (2002), 258–263.

Google Scholar

[16] P.N. Bindumadhavan, H.K. Wah and O. Prabhakar, Mat. Sci. Eng. A, Vol. 323 (2002), 42–51.

Google Scholar

[17] U. Cocen and K. Onel, Compos. Sci. Technol. Vol. 62 (2002), 275–282.

Google Scholar

[18] Y.H. Seo and C.G. Kang Compos. Sci. Technol. Vol. 59 (1999), 643-654.

Google Scholar

[19] S.H. Hong, K.H. Chung and C.H. Lee, Mat. Sci. Eng. A, Vol. 206 (1996), 225-232.

Google Scholar

[20] C.H.J. Davies, W.C. Chen and J.K. Brimacombe, Scripta. Metall. Vol. 37 (1995), No. 3, 309-314.

Google Scholar

[21] M. Manoharan and J.J. Lewandowski, Acta Metall. Vol. 38 (1990), 489-496.

Google Scholar

[22] L.M. Tham, M. Gupta and L. Cheng, Mat. Sci. Eng. A, Vol. 326 (2002), 355–363.

Google Scholar

[23] P.E. McHugh, R.J. Asaro and C.F. Shih, Acta Metall. Mater. Vol. 41 (1993), Issue 5, 1477-1488.

Google Scholar

[24] N.H. Kim, C.G. Kang and B.M. Kim, Int. J. Mech. Sci. Vol. 43 (2001), 1507-1520.

Google Scholar

[25] D.J. Lloyd, Int. Mater. Rev. Vol. 39 (1994), 1-23.

Google Scholar

[26] W.H. Hunt Jr, J.R. Brockenbrough and P.E. Magnusen, Scripta. Metall. Vol. 25 (1991), 15-20.

Google Scholar

[27] S. B Wu and R.J. Arsenault, Mat. Sci. Eng. A, Vol. 138 (1991), 227-235.

Google Scholar

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