Paper Titles
Superplasticity and Superplastic Formability of Hot-Rolled AZ31 Magnesium Alloy
p.231
Superplastic Behaviors of Casting AZ31 Magnesium Alloy
p.237
SPF/DB Research in ZK60 Alloy with Gasification Agent as Pressurization Mediator
p.241
Research on Superplastic Forming of Supplied LY12 Aluminum Alloy for Fishing Spools
p.245
Superplasticity in Ultrafine Grained Magnesium Alloy AZ31 Prepared by Accumulative Roll Bonding
p.249
Finite Element Modeling of Superplastic Forming in the Presence of Back Pressure
p.257
Numerical Simulation of Superplastic Forming of a Magnesium Alloy Part
p.263
Effect of the Process Parameters on the Deformation during Superplastic Extrusion of Ti-6.0Al-2.0Zr-1.0Mo-1.0V Alloy
p.269
FEM Analysis of Superplastic Forming Process for an Oval Head Shell
p.275

Superplasticity in Ultrafine Grained Magnesium Alloy AZ31 Prepared by Accumulative Roll Bonding

Article Preview

Abstract:

In this paper, an ultra-fine grained AZ31 magnesium alloy sheet with grain size less than 3μm was generated by three-run accumulative roll bonding of as cast alloy at a deformation temperature of 350°C and a reduction of 80% for each pass. The microstructures on the different ARB stages were observed and superplasticity examination in the ultrafine grained AZ31 alloy were carried out at a fixed temperature of 300°C and varied strain rate ranging from 10-4 to 10-1 s-1. It is indicated that significant grain refinement was mainly achieved in the first run and gradual uniformity of grain size in the next by continuous dynamic recrystalization. Besides, a superplastic deformation with a moderate elongation-to-fracture of 316% was obtained at a strain rate of 10-2 s-1 indicating a low temperature and high strain rate superplasticity, while a maximum elongation-to-fracture of 562% at10-4 s-1. The strain rate sensitivity exponent as high as of 0.34-0.41 implies the dominant role of grain boundary sliding in superplastic deformation at strain rate ranging from 10-3 to 10-2 s-1. The results indicate a possible approach to produce magnesium alloy sheet with fine grain and excellent deep drawing workability.

You might also be interested in these eBooks
Superplasticity in Advanced Materials - ICSAM 2006 View Preview

Info:

Periodical:

Materials Science Forum (Volumes 551-552)

Pages:

249-254

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.551-552.249

Citation:

Cite this paper

Online since:

July 2007

Authors:

Qing Feng Wang, X.P. Xiao, X.J. Chen, W. Chen

Keywords:

Accumulative Roll Bonding (ARB), Magnesium Alloy, Microstructure, Superplasticity

Export:

RIS, BibTeX

Price:

Permissions CCC:

Request Permissions

Permissions PLS:

Request Permissions

Сopyright:

© 2007 Trans Tech Publications Ltd. All Rights Reserved

Share:

Citation:

References

[1] O.D. Sherby, T.G. Nieh, and J. Wadsworth: Mater. Sci. Forum, Vol. 243-245 (1997), p.11.

Google Scholar

[2] J. Goken, J. Bohlen, and N. Hort, et al.: Mater. Sci. Forum, Vol. 426-432 (2003), p.153.

Google Scholar

[3] W.J. Kim, S.W. Chung, C.S. Chung and D. Kum: Acta Mater., Vol. 49 (2001), p.3337.

Google Scholar

[4] S.W. Chung, K. Higashi and W.J. Kim: Mater. Sci. and Eng. A, Vol. 372 (2004), p.15.

Google Scholar

[5] H. Watanabe, T. Mukai, M. Kohzu, S. Tanabe and K. Higashi: Acta Mater., Vol. 47 (1999), p.3753.

Google Scholar

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

Google Scholar

[7] C.L. Chen and M.J. Tan: Mater. Sci. Eng. A, Vol. 298 (2001), p.235.

Google Scholar

[8] A. Galiyev and R. Kaibyshev: Scripta Mater., Vol. 51 (2004), p.89.

Google Scholar

[9] H. Watanabe, T. Mukai, K. Ishikawa and K. Higashi: Scripta Mate., Vol. 46 (2002), p.851�.

Google Scholar

[10] T.G. Nieh, A.J. Schwartz and J. Wadsworth: Mater Sci Eng A, Vol. 208 (1996), p.30.

Google Scholar

[11] A. Uoya, T. Shibata, K. Higashi, A. Inoue and T. Masumoto: J Mater Res., Vol. 11(1996), p.2731.

Google Scholar

[12] X. Wu and Y. Liu: Scripta Mater., Vol. 46 (2002), p.269.

Google Scholar

[13] T. Mohri, M. Mabuchi and M. Nakamura: Mater Sci Eng A, Vol. 290 (2000), p.139.

Google Scholar

[14] Y.H. Wei, Q.D. Wang, and Y.P. Zhu: Mater Sci Eng A, Vol. 360 (2003), p.107.

Google Scholar

[15] J.C. Tan and M.J. Tan: Scripta Mater, Vol. 47 (2002), p.101.

Google Scholar

[16] M.T. Pérez-Prado, J.A. del Valle and O.A. Ruano: Scripta Mater., Vol. 51 (2004), p.1093.

Google Scholar

[17] Y. Saito, H. Utsunomiya, N. Tsuji and T. Sakai: Acta Mater., Vol. 47(1999), p.579.

Google Scholar

[18] H. Watanabe and H. Tsutsui: Mater. Trans., Vol. 42 (2001), p.1022.

Google Scholar

[19] G.E. Dieter: Mechanical metallurgy (Mc-Graw-Hill, 1986), p.611.

Google Scholar

[20] Q.F. Wang, X.P. Xiao and J. F. Wei: in press. �.

Google Scholar

[21] M. Furukawa, A. Utsonomiya and K. Matsubara: Acta Mater., Vol. 49(2001), p.3829.

Google Scholar

[22] Z.G. Liu, H.J. Fecht and M. Umemotob: Mater Sci Eng A, Vol. 375-377 (2004), p.839.

Google Scholar

[23] M.R. Barnett and F. Montheillet: Acta Mater., Vol. 50 (2002), p.2285.

Google Scholar

[24] S. Tekeli and T.J. Davies: Mater. Sci. Eng. A, Vol. 297 (2001), p.168.

Google Scholar

[25] J. Pilling and N. Ridley: Superplasticity in crystalline solids (Institute of Metals, London 1989), p.214.

Google Scholar