稀土元素和Ti对ZM5镁合金组织和性能的影响  

Effects of Rare Earth Elements and Ti on Microstructure and Properties of ZM5 Magnesium Alloy

作　　者：艾云龙[1] 张剑平[1] 陈乐平[1] 李卫超[1] 

机构地区：[1]南昌航空工业学院材料科学与工程系,江西南昌330034

出　　处：《金属热处理》2005年第12期76-78,共3页Heat Treatment of Metals

基　　金：江西省重大科技攻关项目(CB200201060);江西省材料科学与工程研究中心开放基金(ZX200401003)

摘　　要：用金相显微镜、X射线衍射仪分析了添加稀土元素Y、Nd和钛中间合金的Mg-8.5A l-0.5Zn(ZM5)合金的组织和相组成,测试了合金的室温力学性能。结果表明,添加稀土元素Y、Nd的ZM5镁合金中出现了新的镁-稀土相MgY、Mg12Nd,而在同时添加稀土元素Y、Nd和钛中间合金的合金中,还出现了新相Ti2Mg3A l18;添加稀土元素Y、Nd的ZM5镁合金在拉伸性能、硬度以及组织都明显优于ZM5镁合金,而同时添加稀土元素和Ti合金的镁合金其性能又显著优于单独添加Y或Nd的合金。Microstructures and phase compositions of Mg-8.5Al-0. 5Zn（ ZM5 ）alloy after adding trace Y, Nd and titanium intermetallic alloy were observed using optical microscope and XRD, meanwhile mechanical properties of the alloy at room temperature were tested. The results show that the new phases MgY and Mg12 Nd are found in ZM5 alloy containing rare earth element Y or Nd ,and the new phase Ti2Mg3Al18 is found in the ZM5 alloy containing rare earth Y, Nd and titanium intermetallic alloy together. The mechanical properties, hardness and microstructures of the alloys containing Y or Nd addition are excellent, especially the alloy containing mixed rare earth Y, Nd and Ti alloy.

关 键 词：稀土元素 Mg-8.5Al-0.5Zn(ZM5)镁合金 组织和性能 

分 类 号：TG146.2[一般工业技术—材料科学与工程]