Home HOME Kovove Materialy-Metallic Materials 2021 Kovove Materialy-Metallic Materials Vol. 59 (2021), no. 5, pp.291–302

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Kovove Materialy-Metallic Materials Vol. 59 (2021), no. 5, pp.291–302

Title: The effect of co-addition of La and Nd on microstructures and mechanical properties of squeeze-cast Mg-Al-Zn-La-Nd alloys
Author: P. Cui, Z. Ji, M. Hu, H. Xu, X. Zhang, T. Zhang

Abstract: The effects of co-addition of La and Nd on microstructures and mechanical properties of squeeze-cast Mg-Al-Zn-La-Nd alloys were investigated. Six squeeze-cast Mg-Al-Zn-La-Nd alloys with different La/Nd ratios were prepared. Microstructures, Vickers hardness and compression properties (in room temperature and high temperature) were investigated. The results reveal that the La/Nd ratio has a significant influence on the microstructure and mechanical properties. The microstructure, Mg17Al12 area fraction, Vickers hardness and compression properties of alloys with different La/Nd ratios are different. When the La/Nd ratio is 2/3, the alloy has fine grains, less Mg17Al12 phase content, and excellent mechanical properties. The present research indicates that adding dual REs with appropriate La/Nd ratio to Mg-Al-Zn alloy can effectively improve its performance.

Keywords: AZ91, rare earth; microstructure, mechanical property, squeeze-cast
Published online: 01-Nov-2021
Year: 2021, Volume: 59, Issue: 5 Page From: 291, Page To: 302
doi:10.4149/km_2021_5_291
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