Microstructure Evolution and Mechanical Behavior of CNTs/ AZ31 Magnesium Alloy Composites Processed by Equal Channel Angular Pressing

Abstract:

Article Preview

Carbon Nanotubes /AZ31 alloy composites were fabricated by joining preform of CNTs during melting under the protection of Ar. Composites were prepared by means of equal channel angular pressing ( ECAP) by Bc route in the die with the intersecting angle of 90°. Effects of the pressing passes on the microstructure and the mechanical properties of composites during ECAP were investigated; The fractographs were observed and analyzed via scanning electron microscope (SEM). The results indicate that a great deal of ultra-fine grains appear in CNTs/AZ31 Alloy Composites just after one pass of ECAP; With the increase of pass number, the proportion of ultra-fine grain increases. With 4 pressing passes, the grains are effectively refined to a mean size of 2 μm. And with increasing in the pressing passes, elongation of the composites is increased and the tensile strength is decreased as a result of the refinement of grain size. CNTs were broken under high shearing stress, and the particle distribution in the matrix alloy was homogeneous.

Info:

Periodical:

Advanced Materials Research (Volumes 97-101)

Edited by:

Zhengyi Jiang and Chunliang Zhang

Pages:

1628-1632

Citation:

G. H. Zhou et al., "Microstructure Evolution and Mechanical Behavior of CNTs/ AZ31 Magnesium Alloy Composites Processed by Equal Channel Angular Pressing", Advanced Materials Research, Vols. 97-101, pp. 1628-1632, 2010

Online since:

March 2010

Export:

Price:

$38.00

[1] K. Mathis, J. Gubicza, N.H. Nam. Journal of Alloys and Compounds Vol. 394(2005), p.194−199.

[2] C.S. Goh, J. Wei, L.C. Lee, M. Gupta. Composites Science and Technology Vol. 68(2008) pp.1432-1439.

[3] X. Wu, P. Luo, J.T. Wang, M. Liang, S Xie, K Xia. Materials Forum Vol. 29(2005), p.441−445.

[4] S. Kamado, T. Ashie, Y. Ohshima. Master Sci. Forum Vol. 350 No. 3(2000), pp.5562-5567.

[5] H.K. Lin, J.C. Huang, T.G. Langdon. Materials science & engineering AVol. 402(2005), pp.250-257.

[6] D.H. Shin, I. Kim, J. Kim, K.T. Rark. Acta Materialia Vol. 49 No. 7(2001), pp.1285-1292.

[7] D.H. Shin, I. Kim, J. Kim, Y.S. Kim, S.L. Semiatin. Acta Materialia Vol. 51No. 4(2003), pp.983-996.

[8] R.Z. Valiev, R.K. Islamgaliev, I.V. Alexandrov. Progress in Materials Science Vol. 45 No. 2(2000), pp.103-189.

[9] A. Gholinia, P.B. Prangnell, M.V. Markushev. Acta Mater Vol. 48 No. 5(2000), pp.1115-1130.

[10] W.J. Kim, S.I. Hong, Y.S. Kim. Acta Materialia Vol. 51(2003), p.3293−3307.

[11] H.K. Kim, C.S. Chung, B.S. Cha, B.H. Goo, C.Y. Hyun. Praktische Metallographie Vol. 41 No. 3(2004), pp.142-155.

[12] Xiaoming Feng, Taotao Ai. Trans Nonferrous Met. Soc. China Vol. 19 No. 1(2009), p.293−298.

[13] T. M Hilper, A. Stycznki, J. Kiese, L. Wanger. in: Magnesium alloys and their application, edited by Hamburg: Werkstoff-informations Gesellshaft, (1998).

[14] S.R. Agnew, J.A. Horton, T.M. Lillo, D.W. Brown. Scripta materialia Vol. 50 No. 3(2004), pp.377-381.

Fetching data from Crossref.
This may take some time to load.