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In order to research the different effects of Ce on as-cast microstructure of AZ91 magnesium alloy under different solidifi-cation rates, the die-cast samples with different diameters and different Ce contents were prepared, and some characteristics of as-cast microstructure were analyzed. The results showed that Ce could refine grain size, decrease the fraction of eutecticβ-Mg17Al12 phase, form Al4Ce phase and decrease solid solution of Al in theα-Mg matrix, but the above behaviors of Ce would be weakened under higher solidification rate. The essential reason for Ce to affect as-cast microstructure was that the Ce and Al concentrated in the liquid phase in front of solid/liquid interface during solidification because Ce itself is difficult to solid solute inα-Mg matrix and inhibits solid solution of Al inα-Mg matrix. However, the dynamic condition of concentration of Ce, Al would be changed when solidifica-tion rate varied, resulting in different influence extents of Ce on as-cast microstructure under different solidification rates.

参考文献

[1] 吴道高;颜世宏;王志强;张志琦;苗睿瑛;张小伟;陈德宏.Effect of samarium on microstructure and corrosion resistance of aged as-cast AZ92 magnesium alloy[J].稀土学报(英文版),2014(7):663-671.
[2] 肖代红;黄伯云.铒对AZ91镁合金铸态组织与力学性能的影响[J].中国稀土学报,2008(1):78-81.
[3] 刘生发;王慧源;康柳根;黄尚宇;徐萍.钕对AZ91镁合金铸态组织的影响[J].中国有色金属学报,2006(3):464-469.
[4] 张庆鑫;佟立波;程丽任;江中浩;孟健;张洪杰.Effect of Ce/La microalloying on microstructural evolution of Mg-Zn-Ca alloy during solution treatment[J].稀土学报(英文版),2015(1):70-76.
[5] LI Jiqiang;DONG Xuanpu;FAN Zitian;WANG Yuanqing.Effects of Ce and Sb on the microstructure and properties of AZ91D magnesium alloy prepared by the EPC process[J].稀有金属(英文版),2008(01):41-45.
[6] 陈玉安;金李;方丹;宋裕;叶睿宇.Effects of calcium, samarium addition on microstructure and mechanical properties of AZ61 magnesium alloy[J].稀土学报(英文版),2015(1):86-92.
[7] 杨伟;陈寿辉;张守银;余欢;严青松;蔡长春.冷却速率对AZ91D镁合金非平衡凝固组织的影响[J].中国有色金属学报,2014(3):593-599.
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