合金元素对Mg-Li合金组织及性能的影响  

Influences of Alloying Elements on the Microstructure and Properties of Mg-Li Alloys

作　　者：曾迎[1] 蒋斌[1,2] 李瑞红[1] 刘玉虹[1] 

机构地区：[1]重庆大学材料科学与工程学院,重庆400044 [2]重庆大学国家镁合金材料工程技术研究中心,重庆400044

出　　处：《铸造》2012年第3期275-279,共5页Foundry

基　　金：863项目(2009AA03Z507);重庆大学研究生科技创新基金个人项目(CDJZR11130006)

摘　　要：合金化可以细化Mg-Li合金晶粒,从而提高综合力学性能,还可以改善合金耐蚀性、热稳定性。本文综述了Al、Zn、碱土元素和稀土元素等常用元素对Mg-Li超轻合金微观组织和性能的影响,一般情况下,Al和Zn主要通过固溶强化提高Mg-Li合金强度,碱土元素主要通过细晶强化来提高Mg-Li合金强度,稀土元素则通过细晶强化和金属间化合物的第二相强化来提高Mg-Li合金的综合性能。本文还指出了Mg-Li超轻合金合金化存在的问题及发展趋势。Alloying can increase the comprehensive mechanical properties of Mg-Li alloy with grain refinement. The corrosion resistance and thermal stability are also improved. In the paper, the effects of A1, Zn, alkaline earth metal elements and rare earth elements on microstructures and properties of Mg-Li alloy were summarized in detail. In general, the strength of Mg-Li alloy is increased through solution strengthening of AI and Zn as well as fine-grain strengthening of alkaline earth metal elements, while the comprehensive mechanical properties of Mg-Li alloy are increased through fine-grain strengthening and second phase strengthening of rare earth elements. The existent problem and development trend are also pointed out.

关 键 词：MG-LI合金 合金化 微观结构 性能 

分 类 号：TG146.22[一般工业技术—材料科学与工程]