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Influence of impurities on microstructure and mechanical properties of ZK60 magnesium alloy

ISSN号：1003-6326
期刊名称：《中国有色金属学报：英文版》
时间：0
分类：TG113.12[金属学及工艺—物理冶金;金属学及工艺—金属学] TG146.21[金属学及工艺—金属材料;一般工业技术—材料科学与工程;金属学及工艺—金属学]
作者机构：[1]College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China, [2]National Engineering Research Center for Magnesium Alloys, Chongqing University, Chongqing 400044, China
相关基金：Project（50725413） supported by the National Natural Science Foundation of China; Project（2007CB613704） supported by the National Basic Research Program of China; Project（20090191120013） supported by the PhD Program Foundation of Ministry of Education of China

作者：潘复生[1,2], 毛建军[1], 陈先华[1,2], 彭建[1,2], 王敬丰[1,2]

关键词： ZK60镁合金, 力学性能, 研究组织, 杂质影响, 扫描电子显微镜, 杂质含量, 屈服强度, ZK60合金, ZK60 magnesium alloy, impurities, mechanical properties, microstructure, extrusion, T5 treatment

中文摘要：

微观结构和 ZK60 镁合金的机械性质上的杂质内容的影响被光显微镜学调查，扫描电子显微镜学和张力的测试。ZK60 合金被改变合金的成立时间准备融化在以便控制杂质元素的内容的半连续的扔期间。有更低的纯净内容的合金被发现第二有更少猛抛并且处于当演员组状态的更大的谷物尺寸。处于同样渗出的状态，然而减少杂质从 244 MPa 在在收益力量的谷物尺寸和增加引起减少到 268 MPa，当在有杂质的不同内容的同样渗出的合金的延伸是时几乎一样。在 T5 处理以后，杂质内容被发现在 ZK60 合金的收益力量上有更多的明显的效果。有低杂质内容的 ZK60-45 合金的收益力量在 T5 处理以后被增加直到 295 MPa。

英文摘要：

The influence of impurity content on the microstructure and mechanical properties of ZK60 magnesium alloys was investigated by optical microscopy, scanning electron microscopy and tensile test. ZK60 alloys were prepared by changing holding time of alloy melt during semi-continuous casting in order to control the content of impurity elements. The alloy with lower purity content is found to have less second precipitates and larger grain size in the as-cast state. However, in the as-extruded state, reducing impurities brings about a decrease in grain size and an increase in yield strength from 244 MPa to 268 MPa, while the elongations in the as-extruded alloys with different contents of impurities are almost the same. After T5 treatment, impurity content is found to have more obvious effect on the yield strength of ZK60 alloy. The yield strength of ZK60-45 alloys with low impurity content is increased up to 295 MPa after T5 treatment.

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