Paper Titles
A Comparative Study on Superplasticity of Mg-Zn-Y-Zr Processed by ECAE and Hot Rolling
p.203
Superplastic Forming of Magnesium Alloys: Production of Microstructures, Superplastic Properties, Cavitation Behaviour
p.211
Superplastic Deformation of Magnesium Alloy AZ31 under Biaxial Loading Condition
p.219
Biaxial Tensile Deformation Behavior and Microstructural Evolutions of Superplasticity in AZ31 Magnesium Alloy
p.225
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

Superplasticity and Superplastic Formability of Hot-Rolled AZ31 Magnesium Alloy

Article Preview

Abstract:

The superplasticity of a hot-rolled AZ31 Mg alloy was investigated by uniaxial tensile tests at temperature range 250-450oC and strain rate range 0.7×10-3-1.4×10-1s-1. Superplastic formability of the alloy was evaluated by gas bulging test at elevated temperatures. The threshold stress for grain boundary sliding (GBS) was calculated and the topography during superplastic deformation was observed by SEM. It is found that, at 400 oC and 0.7×10-3 s-1, the maximum elongation reaches 362.5%. GBS is the predominant deformation mechanism and characterized by a pronounced improvement in homogeneity with increasing temperatures, indicating a transformation of GBS mode from cooperative GBS (CGBS) to individual GBS (IGBS). The improved homogeneity of GBS can be interpreted in terms of decreased threshold stress with increasing temperatures. Gas bulging test demonstrates that the temperature for the best superplastic formability is 400 oC and a hemispherical part with a specific limiting dome height of 0.51 was obtained, suggesting good application prospect for this alloy.

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:

231-235

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.551-552.231

Citation:

Cite this paper

Online since:

July 2007

Authors:

D.L. Yin, C.W. Wang, Jing Tao Wang, Yan Dong Yu

Keywords:

Formability, Grain Boundary Sliding (GBS), Magnesium Alloy, Superplasticity, Threshold Stress

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] T. Mohri, M. Mabuchi and M. Nakamura: Mater. Sci. Eng., Vol. A290 (2000), p.139.

Google Scholar

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

Google Scholar

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

Google Scholar

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

Google Scholar

[5] H. Watanabe, T. Mukai and K. Ishikawa: Scr. Mater., Vol. 46 (2002), p.851.

Google Scholar

[6] D.L. Yin, K.F. Zhang, G.F. Wang and W.B. Han: Mater. Letters, Vol. 59 (2005), p.1714.

Google Scholar

[7] T.G. Nieh, J. Wadsworth and O.D. Sherby: Superplasticity in Metals and Ceramics. ( Cambridge University Press, Cambridge 1997).

Google Scholar

[8] F.A. Mohamed: J. Mater. Sci., Vol. 18 (1983), p.582.

Google Scholar

[9] D.L. Yin, K.F. Zhang and G.F. Wang: Mater. Sci. Forum, Vol. 475-479 (2005), p.2923.

Google Scholar

[10] B.L. Aflonso, J.M. Manuel and D.R. Arturo: Scr. Mater., Vol. 34 (1996), p.1155.

Google Scholar

[11] H.J. Frost and M.F. Ashby: Deformation-mechanism maps. ( Pergamon Press, Oxford 1982).

Google Scholar

[12] O.A. Kaibyshev, A.I. Pshenichniuk and V.V. Astanin: Acta Mater., Vol. 46 (1998), p.4911.

Google Scholar

[13] R. Kaibyshev, F. Musin, D.R. Lesuer and T.G. Nieh. Mater. Sci. Eng., Vol. A342 (2003), p.169.

Google Scholar