ABSTRACT In the present study, the effect of Ce alloying element with different quantities (1 and 2 wt.%) on the microstructure and mechanical properties of Mg-5Sn-2Al alloy was investigated. Phase analyses and microstructural studies were carried out using XRD and SEM. It was observed that base alloy was composed of the α-Mg and Mg2Sn intermetallic phase, and after Ce addition Ce5Sn4 intermetallic phase was formed. Also, an increase was detected on the microhardness of the base alloy with increasing Ce addition. The test results showed that Ce addition has no notable effect on the tensile properties at room temperature but has a positive effect at elevated temperatures. Furthermore, creep properties of the Mg-5Sn-2Al alloy were obviously improved by adding Ce. The values of stress exponents and activation energy indicated that the dominant creep mechanisms of the alloys were identified dislocation climb controlled creep..

中文翻译：

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铈对 Mg-Sn-Al 基合金蠕变性能的影响

摘要 在本研究中，研究了不同数量（1 和 2 wt.%）的 Ce 合金元素对 Mg-5Sn-2Al 合金的显微组织和机械性能的影响。使用XRD和SEM进行相分析和显微结构研究。观察到基体合金由α-Mg和Mg2Sn金属间相组成，加入Ce后形成Ce5Sn4金属间相。此外，随着Ce添加量的增加，基体合金的显微硬度也有所增加。测试结果表明，Ce 添加对室温下的拉伸性能没有显着影响，但在升高的温度下有积极的影响。此外，Mg-5Sn-2Al合金的蠕变性能通过添加Ce得到明显改善。