Effects of Element Yttrium on the Microstructure and Mechanical Properties of as-Cast Zn-25Al-5Mg-2.5Si Alloy



In this work, the effects of rare element yttrium (Y) on the microstructure and mechanical properties of the as-cast Zn-25Al-5Mg-2.5Si alloy at room and elevated temperature (100°C and 180°C) have been investigated. The alloys were prepared by conventional melting and casting routs with different Y contents (0 wt.%,0.1 wt.%,0.4 wt.%,0.8 wt.%,1.2 wt.% and1.5 wt.%). The results showed that the addition of Y element led to the formation of Al3Y phase and Y2Zn17 phase in the microstructure and the mechanical properties of the alloys rose at first and then dropped with the Y content increasing. When Y content was 0.4 wt.%, the optimization of microstructure and properties especially the tensile strength at high temperature was obtained. The tensile strength of the alloy at 180°C could be increased by 26.4%.




Zhongning Guo




A. L. Wei et al., "Effects of Element Yttrium on the Microstructure and Mechanical Properties of as-Cast Zn-25Al-5Mg-2.5Si Alloy", Advanced Materials Research, Vols. 311-313, pp. 591-595, 2011


August 2011




[1] Liushuan Yang, Hongmin Wang and Quande Chen: High-Aluminum Zinc Alloys (Northwestern Polytechnical University Press, XiAn 1997). In China.

[2] Wei Zhang: Foundry Technology. Vol. 2 (1993), pp.36-39. In China.

[3] Yuping Zhang and Gang Sun: New Technology & New Process. Vol. 1 (1996), pp.23-25.

[4] Liushuan Yang, Gencang Yang and Yaohe Zhou: Materials Review. Vol. 8 (1994), pp.13-16.

[5] Zhang Zhenguo, Tang Feng and Liu Ying: Hot Working Technology. Vol. 7 (2005), pp.20-21.

[6] M.F. Horstemeyer, N. Yang: Acta mater. Vol. 52 (2004), p.1327–1336.

[7] N.J. Petch, J: Iron Steel Inst. Vol. 174 (1953), p.25–26.

[8] E.O. Hall, Proc: Phys. Soc. B Vol. 64 (1951), p.747–753.

[9] Xiaowei Wei and Baoluo Shen: Materials for Mechanical Engineering. Vol. 27 (2003), pp.50-53.

[10] Jun Chen, Quan'a n Li and Xiaofeng Li et al: Special Casting & Nonferrous Alloys. Vol. 28 (2008), pp.980-982. In China.

[11] D.K. Xu, W.N. Tang and L. Liu et al: Journal of Alloys and Compounds. Vol. 432 (2004), pp.129-134.