摘要
研究了Mg-Al-Zn-Y合金铸态及固溶态的显微组织和力学性能。通过光学显微镜观察到合金中Y的含量在一定范围内时,Y能显著细化镁合金组织;当Y的添加量为1%时,合金有最好的力学性能。通过扫描电镜(SEM)和能谱仪(EDS)分析发现有新相Al2Y生成;新相在400℃退火9h并不能消去,一定量呈块状离散分布的新相Al2Y有利于提高合金的力学性能。
The microstructure and mechanical properties of as-cast and solid solution Mg-Al-Zn-Y alloy were investigated by optical microscopy, scanning electron microscopy and dispersive energy spectrum. The results show that Y can significantly refine microstructure of Mg-Al-Zn-Y alloy at a certain range. Mg-Al-Zn-Y alloy with 1% Y addition has the best mechanical properties. A new phase Al2Y is presented, which can not be eliminated after annealing at 400℃ for 9 h, and a certain amount of new phase AI2 Y that is dispersed in block can improve the mechanical properties of Mg-Al- Zn-Y alloy.
出处
《铸造技术》
CAS
北大核心
2008年第10期1372-1376,共5页
Foundry Technology
基金
山西省自然科学基金资助项目(2007011067)
关键词
镁合金
钇
显微组织
力学性能
Magnesium alloy
Yttrium
Microstructure
Mechanical properties
