Influence of Gd Content on the Microstructure and Mechanical Properties of Zn-Al-Mg-Si Alloy

Abstract:

The microstructure and mechanical properties of the as-cast Zn-25Al-5Mg-2.5Si-xGd alloys at room and elevated temperature have been investigated in this work. The results show that the addition of element Gd leads to the grain refining and the formation of Al3Gd phase and GdZn12 phase in the microstructure, and the mechanical properties of the alloys rise at first and then drop with the Gd content increasing. When Gd content is 0.8wt.%, the optimization of microstructure and mechanical properties is obtained. The alloy can be increased by 13.9%, 37.7% and 45.6% in tensile strength and be increased by 13.4%, 76.9% and 78.2% in hardness at room temperature, 100°C and 180°C, respectively.

• Periodical: Advanced Materials Research (Volumes 652-654)
• Pages: 1059-1062
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.652-654.1059
• Online since: January 2013
• Authors: Ai Li Wei, Xing Hai Liu, Kun Yu Zhang, Wei Liang
• Keywords: Grain Refinement, Microstructure, Tensile Strength, Zn-Al-Mg-Si-Gd Alloy

References

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

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

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

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

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

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

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