Effects of Zinc and Aluminum Concentration on the Microstructure and Properties of ZA Series Mg Alloys

Abstract:

The microstructures of a series of high Zn magnesium alloys Mg-(7-11) Zn-(2-6) Al alloys were clarified, and effects of Zn and Al concentration about the ZA system alloys on the microstructure and properties were also investigated. For Mg-(7-11)Zn-4Al alloys with the Zn content increase, improved creep resistance is obtained due to block τ-Mg₃₂(Al, Zn)₄₉ phase, with severe reduction in ultimate strength and ductility, and the best creep property is obtained with 11wt.% Zn concentration. However, a bit increasing Al content of Mg-9Zn-(2-6)Al alloys contributes to the improvement in the ambient and elevated-temperature yield strength, but seriously deteriorates the creep properties for the formation of lamellar φ-Al₂Mg₅Zn₂ eutectics or Mg₅₁Zn₂₀ phase.

• Periodical: Advanced Materials Research (Volumes 798-799)
• Pages: 97-100
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.798-799.97
• Online since: September 2013
• Authors: Jian Hua Sun, Hai Gu, Guo Ding Yuan
• Keywords: As-Cast Microstructure, Creep Property, Tensile Strength

References

[1] K. C. Park, B. H. Kim and S. M. Jo: Applied Mechanics and Materials Vol. 152-154(2012), p.1207.

[2] A. Luo, M. O. Pekguleryuz: J. Mater. Sci. Vol. 29(1994), p.5259.

[3] A. Suzuki, N. D. Saddock, J. W. Jones: Acta Mater. Vol. 53(2005), p.2823.

[4] X. F. Wan, Y. S. Sun and F. Xue: Materials Science and Engineering: A Vol. 508 (2009), p.50.

[5] I. Higashi, N. shiotani, M. Uda: Journal of Solid State Chemistry Vol. 36(1981), p.225.

[6] L. Bourgeois, C. L. Mendis and B. C. Muddle: Acta Mater Vol. 49(2001), p.2701.