Effect of Ce addition on microstructures and mechanical properties of A380 aluminum alloy prepared by squeeze-casting

Xiao-hui Ao; Shu-ming Xing; Bai-shui Yu; Qing-you Han

doi:10.1007/s12613-018-1602-y

Volume 25 Issue 5

May 2018

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Article Navigation > International Journal of Minerals, Metallurgy and Materials > 2018 > 25(5): 554-563

Xiao-hui Ao, Shu-ming Xing, Bai-shui Yu, and Qing-you Han, Effect of Ce addition on microstructures and mechanical properties of A380 aluminum alloy prepared by squeeze-casting, Int. J. Miner. Metall. Mater., 25(2018), No. 5, pp. 554-563. https://doi.org/10.1007/s12613-018-1602-y

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Xiao-hui Ao, Shu-ming Xing, Bai-shui Yu, and Qing-you Han, Effect of Ce addition on microstructures and mechanical properties of A380 aluminum alloy prepared by squeeze-casting, Int. J. Miner. Metall. Mater., 25(2018), No. 5, pp. 554-563. https://doi.org/10.1007/s12613-018-1602-y

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Research Article

Effect of Ce addition on microstructures and mechanical properties of A380 aluminum alloy prepared by squeeze-casting

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Corresponding author:
Shu-ming Xing E-mail: smxing@bjtu.edu.cn
Received: 10 October 2017; Revised: 29 January 2018; Accepted: 30 January 2018

Abstract

Abstract

The effect of cerium (Ce) addition on the eutectic Si, β-Al₅FeSi phase, and the tensile properties of A380 alloy specimens prepared by squeeze-casting were studied by optical microscopy (OM), scanning electron microscopy (SEM), and X-ray diffraction (XRD). The experimental results showed that Ce more effectively modified the eutectic Si and refined the β-Al₅FeSi. The refinement effect significantly increased under a specific pressure of 100 MPa with the addition of Ce from 0.1wt% to 0.9wt%. In contrast, the average length and the aspect ratio of the eutectic Si and β-Al₅FeSi exhibited their optimal values when the content of the added Ce was greater than 0.5wt%. Needle-like Al8Cu4Ce was precipitated with the addition of excessive Ce; hence, the mechanical properties of A380 gradually decreased with increasing Ce content in the range from 0.3wt% to 0.9wt%.
- cerium;
- eutectic Si;
- Fe-rich phases;
- squeeze-casting;
- mechanical properties

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