摘要
采用铸锭冶金法制备了含不同量稀土元素Er的Al-5Mg合金。发现稀土Er可以有效细化Al-Mg铸态晶粒,当Er含量达0.7%时,基本上消除枝晶,且晶粒大小仅为不加Er Al-5Mg合金的1/10。使用硬度测试、金相组织观察、SEM及热分析等方法,研究了稀土元素Er对Al-5Mg合金铸态组织的细化与强化机理。
Al-5Mg alloys with different content of Er addition were prepared by using ingot metallurgy processing. It is found that rare earth Er is effective in refining grain size of as-cast microstructure.When alloy contains 0.7% Er,dendritic structure is almost eliminated, and the grain size is as 7 times large as that in Al-5Mg alloy. With hardness measure, optical microscope, scanning electron microscope and thermo analysis, this paper study the mechanism that rare earth Er refine grain size and improve the strength of as-cast structure
出处
《轻合金加工技术》
CAS
北大核心
2005年第10期19-21,28,共4页
Light Alloy Fabrication Technology
基金
国家"973"重大基础规划研究项目资助课题(G1999064907)