Effects of aging treatment on microstructure, mechanical properties and corrosion resistance of biodegradable Mg-2.0Zn-0.5Zr-3.0Gd magnesium alloy

被引：0
|
作者：
Yao H. [1 ,2 ]
Liu Y. [1 ]
Du S.-M. [1 ,2 ]
Xiong Y. [1 ,2 ]
Wen J.-B. [1 ,2 ]
机构：
[1] School of Materials Science and Engineering, Henan University of Science and Technology, Luoyang
[2] Collaborative Innovation Center of Nonferrous Metals, Luoyang
来源：
Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals | 2020年 / 30卷 / 03期
基金：
中国国家自然科学基金;
关键词：
Biocorrosion properties; Magnesium alloys; Mechanical properties; Microstructure;
D O I：
10.11817/j.ysxb.1004.0609.2020-37555
中图分类号：
学科分类号：
摘要：
The effects of aging time on the microstructure and mechanical properties of Mg-2.0Zn-0.5Zr-3.0Gd biomedical magnesium alloy were investigated by optical microscope (OM), scanning electron microscope (SEM), transmission electron microscope (TEM) and tensile properties tests. The results show that the size and quantity of precipitated phases in the alloy increase with the increase of aging time at range of 4-20 h. The precipitated phases are mainly in the form of nano-sized rod-like and granular (Mg, Zn)3Gd phase. While partially rod-like precipitated phase has coherent interface relationship with α-Mg matrix. The strength and elongation of the alloy gradually increase with the increasing of the aging time, and then decrease. In the 120 h immersion experiment, the average corrosion rates, number and size of corrosion holes in the alloy increased with increase of the aging time. The corrosion rate decreases at first, then increase, and then decrease slowly. At last, it tends to be stable with the increase of immersion time. © 2020, Science Press. All right reserved.
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页码：518 / 529
页数：11
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