Y元素对铸态Mg-Al-Ca-Mn合金组织与耐腐蚀性能的影响
Effects of Y Element on Microstructure and Corrosion Resistance of As-Cast Mg-Al-Ca-Mn-Y Alloy
何卉 1温祥辉2
作者信息
- 1. 河南大学 化学化工学院,河南 开封 475001;郑州商业技师学院,河南 郑州 450007
- 2. 河南工业大学 材料科学与工程学院,河南 郑州 450001
- 折叠
摘要
采用金相显微镜、扫描电镜、XRD分析、腐蚀试验和电化学测试等研究了Mg-4Al-3Ca-0.7Mn-xY(x=0、0.8、1.5)铸态合金的微观组织与耐腐蚀性能.结果表明:未添加Y的Mg-4Al-3Ca-0.7Mn合金组织由α-Mg、Al2Ca相、Mg2Ca相组成.添加 0.8wt%Y后,合金组织中晶粒得到明显细化,析出相变得细小,Al2Ca相、Mg2Ca相数量减少,并有Al2Y相生成.Y含量增加到 1.5wt%时,合金晶粒细化效果不明显,大量Al2Y相聚集在晶界处呈网状分布.添加适量的Y可提高Mg-4Al-3Ca-0.7Mn-xY合金的耐腐蚀性,Y添加量为 0.8wt%时,该合金的耐腐蚀性最佳.
Abstract
The microstructure and corrosion resistance of as-cast Mg-4Al-3Ca-0.7Mn-xY(x=0,0.8,1.5)alloys were investigated by metallographic microscope,scanning electron microscope,XRD,corrosion test and electrochemical test.The results show that the microstructure of Mg-4Al-3Ca-0.7Mn alloy without Y is composed of α-Mg,Al2Ca and Mg2Ca phases.After adding 0.8wt%Y,the grains in the microstructure of the alloy are obviously refined,and the precipitation phase is fine.The number of Al2Ca and Mg2Ca phases is reduced,and the Al2Y phase is formed.When Y content increases to 1.5wt%,the grain refinement effect is not obvious,and a large amount of Al2Y phase aggregate in a network distribution at grain boundaries.The corrosion resistance of Mg-4Al-3Ca-0.7Mn-xY alloy can be improved by adding appropriate Y element.The corrosion resistance of the alloy is best when the addition amount of Y is 0.8wt%.
关键词
Mg-Al-Ca-Mn-Y合金/Y元素/微观组织/耐腐蚀性Key words
Mg-Al-Ca-Mn alloy/Y elements/microstructure/corrosion resistance引用本文复制引用
基金项目
河南省自然科学基金资助项目(162300410032)
出版年
2024
NETL
NSTL
万方数据