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首页> 外文期刊>Journal of Materials Engineering and Performance >The Mechanical Properties and Corrosion Behavior of Quaternary Mg-6Zn-0.8Mn-xCa Alloys
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The Mechanical Properties and Corrosion Behavior of Quaternary Mg-6Zn-0.8Mn-xCa Alloys

机译：Mg-6Zn-0.8Mn-xCa四元合金的力学性能和腐蚀行为

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摘要

In present study, the influence of calcium content on the microstructure, mechanical properties and corrosion behavior of quaternary Mg-6Zn-0.8Mn-xCa alloys, where x = 1, 1.5, 3 or 4.5 wt.% Ca, was examined. The grain structure of this quaternary alloy system became more refined with increasing additions of Ca. In addition to alpha-Mg, the Ca2Mg6Zn3 phase was found to be present in Mg-6Zn-0.8Mn-1Ca and Mg-6Zn-0.8Mn-1.5Ca according to microstructural and thermal analysis (TA). In addition to the alpha-Mg and Ca2Mg6Zn3 phases, the Mg2Ca phase was found to be present in the Mg-6Zn-0.8Mn-3Ca and Mg-6Zn-0.8Mn-4.5Ca alloys. Alloys with 1 or 1.5 wt.% Ca led to increases in the tensile strength of Mg-6Zn-0.8Mn, although further Ca additions had a deleterious effect. The TA of Mg-6Zn-0.8Mn-xCa during its solidification indicates that the fraction of liquid phase increases with increasing Ca content at the dendrite coherency point, leading to an increase in secondary phases and increased corrosion rate of Mg-6Zn-0.8Mn-xCa alloys.
机译：在本研究中，研究了钙含量对四元Mg-6Zn-0.8Mn-xCa合金（x = 1、1.5、3或4.5 wt。％Ca）的组织，力学性能和腐蚀行为的影响。随着钙的添加，这种四元合金体系的晶粒结构变得更加细化。根据微结构和热分析（TA），除了α-Mg外，还发现Ca2Mg6Zn3相存在于Mg-6Zn-0.8Mn-1Ca和Mg-6Zn-0.8Mn-1.5Ca中。除了α-Mg和Ca2Mg6Zn3相之外，Mg-6Zn-0.8Mn-3Ca和Mg-6Zn-0.8Mn-4.5Ca合金中还存在Mg2Ca相。具有1或1.5重量％的Ca的合金导致Mg-6Zn-0.8Mn的抗张强度的增加，尽管进一步添加Ca具有有害的作用。 Mg-6Zn-0.8Mn-xCa凝固过程的TA表明，液相分数随枝状体相干点Ca含量的增加而增加，导致Mg-6Zn-0.8Mn的二次相增加，腐蚀速率增加。 -xCa合金。

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