摘要
通过拉伸试验、浸泡实验、电化学测试、扫描电镜(SEM)以及光学显微镜(OM)等方法研究了Dy含量对Mg-2Zn-0.5Zr-xDy生物镁合金微观组织、耐腐蚀性能和力学性能的影响。结果表明:随Dy含量的增加,合金的晶粒尺寸逐渐变小,第二相逐渐增多且主要沿晶界分布,合金的平均腐蚀速率先降低后升高,合金的力学性能先升高后降低;当Dy含量为1.5 mass%时,合金的耐蚀性能和综合力学性能均最好,平均腐蚀速率从未添加稀土元素时的1.28 mm/a降为0.92 mm/a,抗拉强度和伸长率分别为154 MPa和8.6%。
Effects of rare earth element Dy content on microstructure, corrosion resistance and mechanical properties of Mg-2 Zn-0.5 Zr-xDy biological magnesium alloy were studied by means of tensile test, immersion test, electrochemical test, scanning electron microscopy(SEM) and optical microscope(OM). The results show that with the increase of Dy content, the grain size of the alloy decreases gradually, and the second phase increases gradually and distributes mainly along the grain boundary, the average corrosion rate of the alloy decreases at first and then increases, and the mechanical properties of the alloy increase at first and then decrease. When the content of Dy is 1.5 mass%, the corrosion resistance and comprehensive mechanical properties of the alloy are the best, and the average corrosion rate decreases from 1.28 mm/a(without Dy addition) to 0.92 mm/a(with 1.5 mass%Dy addition), the tensile strength and elongation of the alloy are 154 MPa and 8.6%, respectively.
作者
师慧娜
贺俊光
文九巴
李欢
徐大召
刘庆庆
SHI Hui⁃na;HE Jun⁃guang;WEN Jiu⁃ba;LI Huan;XU Da⁃zhao;LIU Qing⁃qing(School of Materials Science and Engineering,Henan University of Science and Technology,Luoyang 471023,China;Collaborative Innovation Center of Nonferrous Metals,Henan Province,Luoyang 471023,China)
出处
《材料热处理学报》
EI
CAS
CSCD
北大核心
2020年第1期12-18,共7页
Transactions of Materials and Heat Treatment
基金
河南省自然科学基金(162300410213)
河南省教育厅科技攻关项目(14A430001)
河南省科技攻关计划项目(152102210077)
关键词
生物镁合金
稀土Dy
耐蚀性
力学性能
bio-magnesium alloy
rare earth Dy
corrosion resistance
mechanical property