Effects of Y, Gd on Microstructure and Mechanical Properties of AZ61 Magnesium Alloy

Abstract:

The effects of Y and Gd on the microstructure and mechanical properties of AZ81 magnesium alloy were studied by alloy preparation, microstructure analysis and mechanical property testing. The results show that moderate addition of Y and Gd to AZ61 magnesium alloy can obviously refine grains of AZ61 alloy, and decrease the amount of Mg₁₇Al₁₂ phase. With the increase of alloying elements, the tensile strength and elongation of aged AZ61 magnesium alloy at the temperature ranging of 25°C～175°C rise at first and then drop.When content of Y and Gd is up to 2.7%，the values of tensile strength of the alloy at room temperature and 175°C are up to their maximums, 254MPa and 164MPa respectively, while the elongation of the alloy are 22.9%,18.7% respectively. Y and Gd improve the mechanical properties of AZ61 alloy because of the grain refining strengthening, solution strengthening and the dispersion strengthening.

• Periodical: Advanced Materials Research (Volume 800)
• Pages: 225-228
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.800.225
• Online since: September 2013
• Authors: Xiao Jie Song, Quan An Li, San Ling Fu
• Keywords: AZ61, Gd, Mechanical Property, Microstructure, Y

References

[1] A. Kaveh, T. Alireza, K. Farzad. Material Science and Engineering A, Vol. 523(2009), pp.27-31.

[2] L. Shepeleva, M. Bamberger. Materials Science and Engineering, Vol. 425(2006), pp.312-317.

[3] J. Chen, Q. A. Li, F.X. Li, et al. Special Casting and Nonferrous Alloys, Vol. 28(2008), pp.980-982(in Chinese).

[4] J. Xu, F.P. Li, F. Guo, et al. Material and Heat Treatment, Vol. 38(2009), pp.32-34(in Chinese).

[5] G.R. Li, H.M. Wang, Y.T. Zhao, et al. Rare metal materials and engineering, Vol. 39(2010), pp.80-84(in Chinese).

[6] Z. Liu, H.T. Ji, X.F. Sheng, et al. Journal of Shenyang University of Technology, Vol. 28(2006), pp.481-487(in Chinese).