Effect of Rare Earth Upon As-Cast Microstructure and High Temperature Performance of ZA40 Alloy

Jiaming Ji*, 1, 2, Guocui Meng1, 2, Yuanyong Lu3, Honghong Shao1, 2, Dongqing Gu1, 2
1 School of Material Science and Engineering, Jiangsu University, Zhenjiang, Jiangsu, 212013, P.R. China
2 Key Laboratory of High-End Structural Materials, Zhenjiang, Jiangsu, 212013, P.R. China
3 Zhenjiang Huitong Metal Forming Co., Ltd, Zhenjiang, Jiangsu, 212028, P.R. China

© 2014 Jiaming et al

open-access license: This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International Public License (CC-BY 4.0), a copy of which is available at: ( This license permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.


In testing comparison, this study is made on the modification effect of 0.05 wt.% La-rich rare earth (RE) upon as-cast microstructure, mechanical properties of materials at high temperatures (100, 150, 200°C) and wear resistance under different temperatures (100and 200°C) of ZA40 alloy containing Si. The addition of RE shows that it can not only effectively refine Al-rich and Cu-rich phase, but also reduce the amount of needle-like eutectic silicon, and then make the size of massive primary silicon phase smaller. Thus, there are the improvement of strength, ductility and wear resistance of materials at high temperature. The analyses are also conducted on the mechanism of underlying RE elements.

Keywords: High temperature performance, high temperature wear resistance, microstructure, mixed rare earth, ZA40.