Effect of Equal Channel Angular Extrusion on the Microstructure and Mechanical Properties of Magnesium Alloy Containing Quasicrystallines

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Equal channel angular extrusion (ECAE) was applied to an extruded ZW1101 (Mg - 11wt%Zn - 0.9wt%Y) Mg alloy containing quasicrystallines. The as-extruded ZW1101 alloy had an initial grain size of about 12 µm and bands of quasicrystalline phases parallel to the extrusion direction. After the extruded alloy was subjected to ECAE processing, the grain size was refined to about 0.5 µm, and the quasicrystalline phases were further broken and dispersed in the matrix. After the ECAE processing, the micro-hardness and yield strength of the alloy were increased, however, the ultimate tensile strength and the ductility of the alloy were slightly decreased.

Info:

Periodical:

Materials Science Forum (Volumes 488-489)

Edited by:

W.Ke, E.H.Han, Y.F.Han, K.Kainer and A.A.Luo

Pages:

589-592

Citation:

M. Y. Zheng et al., "Effect of Equal Channel Angular Extrusion on the Microstructure and Mechanical Properties of Magnesium Alloy Containing Quasicrystallines", Materials Science Forum, Vols. 488-489, pp. 589-592, 2005

Online since:

July 2005

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$38.00

[1] Z. P. Luo, S.Q. Zhang, Y. L. Tang and D. S. Zhao: Scr. Metall. Vol. 28 (1993), P. 1513.

[2] D. H. Bae, S. H. Kim, D.H. Kim and W. T. Kim: Acta Mater. Vol. 50 (2002), P. 2343.

[3] S. Taniuchi, H. Watanabe, H. Okumura. S. Kamado, Y. Kojima and Y. Kawamura: Mater. Sci. Forum, Vol. 419-422 (2003), P. 255.

[4] A. Singh, M. Nakamura, M. Watanabe, A. Kato and A. P. Tsai: Scr. Metall. Vol. 49 (2003), P. 417.

[5] M. Y. Zheng, X. G. Qiao, S. W. Xu and K. Wu, S. Kamado, Y. Kojima: Mater. Sci. Forum, Vol. 475-479 (2005), P. 469.

[6] D. Shechtman, I. Bleach, D. Gratias and J.W. Cahn: Phy. Rev. Lett. Vol. 53 (1984), P. (1951).

[7] R. Z. Valiev, R. K. Islamgaliev and I. V. Alexandrov: Progress in Mater. Sci. Vol. 45 (2000), P. 103.

[8] M. Mabuchi, K. Ameyama, H. Iwasaki and K. Higashi: Acta Mater. Vol. 47 (1999), P. (2047).

[9] A. Galiyev, R. Kaibyshev and G. Gottstein: Acta Mater. Vol. 49 (2001), P. 1199.

[10] X. G. Qiao, Master thesis, Harbin Institute of Technology, P. R. China, 2004 Fig. 4 Microhardness of as-ECAE processed ZW 1101 alloy. Fig. 5 Tensile stress-strain curves for the ECAE processed ZW1101 alloy. 0 5 10 15 20 0 100 200 300 400 Stress, MPa Strain, % as-extruded 1 pass 2 passes 4 passes.