Paper Titles
Relationship between Tensile Deformation and Crystallographic Orientation of Grains in the Balanced Al-Mg2 Si Alloys
p.125
Relationship between Tensile Deformation and Crystallographic Orientation of Grains in Al-Mg-Si Alloys with Cu
p.129
Influence of Compressive Torsion Processing Temperature on Microstructure Refinement and Property of Aluminum Alloy
p.133
Heat Resistance of Mg-Nd Based Casting Alloys Containing Gadolinium and Yttrium
p.137
Effect of Ca and Sr Content on Elevated Temperatures Mechanical Properties of a Cast AZ91 Magnesium Alloy
p.141
Mechanical Properties of Twin Roll Cast AZ91 Magnesium Alloy at Room Temperature
p.145
Influence of Initial Texture on Twin Formation and Plastic Deformation of Rolled AZ31 Mg Alloy
p.149
Microstructure and Dynamic Ultra-Micro Hardness of the As-Cast and Extruded Mg-Al-Ca-Sm Alloys
p.153
HRTEM Observation of the Age Hardening Precipitates in Mg-Zn Alloy
p.157

Effect of Ca and Sr Content on Elevated Temperatures Mechanical Properties of a Cast AZ91 Magnesium Alloy

Article Preview

Abstract:

The effect of Ca and Sr content on the microstructure and mechanical properties of a cast AZ91 magnesium alloy is investigated. Ca and Sr additions in AZ91 magnesium alloy are expected high creep resistance. The microstructure of the alloy exhibits the dendritic α-matrix and the second-phases forming networks on the grain boundary. Tensile tests at elevated temperatures between 448 and 523K reveal that the creep resistance was improved with increasing the additional amount of Ca, especially more than 1.0wt%. From the perspective of grain refinement effect, it is expected that the additions of Ca and Sr to AZ91 magnesium alloy not only improve creep resistance but also improve mechanical properties at room temperature.

You might also be interested in these eBooks
Advanced Materials and Processing View Preview

Info:

Periodical:

Advanced Materials Research (Volumes 26-28)

Pages:

141-144

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.26-28.141

Citation:

Cite this paper

Online since:

October 2007

Authors:

Ippei Takeuchi, Kinji Hirai, Yorinobu Takigawa, Tokuteru Uesugi, Kenji Higashi

Keywords:

AZ91 Mg Alloy, Ca Content, Climb-Controlled Dislocation Creep, Creep Resistance, Sr Content

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] Y. Kojima: Mater. Trans. Vol. 42 (2001), pp.1154-1159.

Google Scholar

[2] K. Hirai, H. Somekawa, Y. Takigawa and K. Higashi: Mater. Sci. Eng. A Vol. 403 (2005), pp.276-280.

Google Scholar

[3] S. Lee, S.H. Lee and D.H. Kim: Metal. Mater. Trans. A Vol. 29 (1998), pp.1221-1235.

Google Scholar

[4] Q.D. Wang, W.D. Chen, X.Q. Zeng, Y.Z. Lu, W.J. Ding, Y.P. Zhu, X.P. Xu and M. Mabuchi: J. Mater. Sci. Vol. 36 (2001), pp.3035-3040.

Google Scholar

[5] M.O. Pekguleryuz and E. Baril, in: J. Hryn (Ed. ), Magnesium Technology, TMS (The Minerals, Metals and Materials Society), 2001, pp.119-125.

Google Scholar

[6] A. Luo and M.O. Pekguleryuz: J. Mater. Sci. Vol. 29 (1994), pp.5259-5271.

Google Scholar

[7] I.A. Anyanwu, Y. Gokan, S. Nozawa, A. Suzuki, S. Kamado, Y. Kojima, S. Takeda and T. Ishida: Mater. Trans. Vol. 44 (2003), pp.562-570.

DOI: 10.2320/matertrans.44.562

Google Scholar

[8] H. Somekawa, K. Hirai, H. Watanabe, Y. Takigawa and K. Higashi: Mater. Sci. Eng. A Vol. 407 (2005), pp.53-61.

Google Scholar

[9] H.J. Frost and M.F. Ashby: Deformation Mechanism Map, Pergamon Press, (1982), p.44.

Google Scholar

[10] B. Jing, S. Yangshan, X. Shan, X. Feng and Z. Tianbai: Mater. Sci. Eng. A Vol. 419 (2006), pp.181-188.

Google Scholar