Microstructure and Mechanical Properties of an AZ31 Magnesium Alloy Processed by Accumulative Back Extrusion (ABE)

Abstract:

A new continuous severe plastic deformation (SPD) method called accumulative back extrusion (ABE) was employed to fabricate ultra-fine grained AZ31 Mg alloy. Microstructures of AZ31 alloy processed by ABE up to four passes at a temperature of 230 °C were investigated using field emission scanning electron microscopy (FESEM). The results showed that the initial average grain size of 25 µm was reduced to about 1 µm. It was also found out that the more passes gave more homogenous microstructure. In addition, in order to find the effect of grain size on the mechanical properties, micro-tension tests were carried out and the changes in the yield and tensile strength and fracture elongation were analyzed. The obtained tensile properties were discussed relying on the characteristics of as-processed microstructures.

• Periodical: Materials Science Forum (Volumes 667-669)
• Pages: 1033-1038
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.667-669.1033
• Online since: December 2010
• Authors: Mahmood Fatemi Varzaneh, Jose María Cabrera, Abbass Zarei-Hanzaki
• Keywords: ABE, AZ31, Mechanical Property, Severe Plastic Deformation (SPD)

References

[1] S.M. Fatemi-Varzaneh and A. Zarei-Hanzaki: Mater. Sci. Eng. A Vol. 504 (2009), p.104.

[2] S.M. Fatemi-Varzaneh, A. Zarei-Hanzaki, M. Naderi, A.A. Roostai: J. Alls. Compd. Vol. 507 (2010), p.207.

[3] S.M. Fatemi-Varzaneh and A. Zarei-Hanzaki, in: 2th Ultra Fine Grained and Nano Materials, 14-15 Nov., Tehran, Iran (2009).

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

[5] S.R. Agnew, G.M. Stoica, L.J. Chen, T.M. Lillo, J. Macheret, P.K. Liaw In: Ultrafine grained materials II, edited by Zhu YT et al., Warrendale, PA: TMS, (2002) p.643.

DOI: 10.1002/9781118804537.ch72

[6] T. Mukai, Y. Masashi, K. Higashi: Mater Trans JIM Vol. 42 (2001), p.2652.

[7] C.W. Su, L. Lu, M.O. Lai: Mater. Sci. Eng. A Vol. 434 (2006), p.227.

[8] Y. Chino, K. Sassa and M. Mabuchi: Scr. Mater. Vol. 59 (2008), p.399.

[9] K. Xia, J.T. Wang, X. Wu, G. Chen, M. Gurvan: Mater. Sci. Eng. A Vol. 410–411 (2005), p.324.

[10] W.M. Gan, M.Y. Zheng, H. Chang, X.J. Wang, X.G. Qiao, K. Wu, B. Schwebke, H. -G. Brokmeie: J. Alls. Compd. Vol. 470 (2009), p.256.

[11] P.G. Sanders, J.A. Eastman, J.R. Weertman: Acta Mater. Vol. 45 (1997), p.4019.

[12] A. Yamashita, Z. Horita, T. G. Langdon: Mater. Sci. Eng. A Vol. 300 (2001), p.142.

[13] H.K. Kim, W.J. Kim: Mater. Sci. Eng. A Vol. 385 (2004), p.300.

[14] Q. Yang, A.K. Ghosh: Acta Mater Vol. 54 (2006), p.5159.

[15] Z.S. Basinski, M.S. Szczerba, M. Niewczas, J.D. Embury, S.J. Basinski: Rev. Metall. Vol. 94 (1997), p.1037.

DOI: 10.1051/metal/199794091037