Zr对Mg-Zn-RE合金显微组织及力学性能的影响  

Effects of Zr on Microstructure and Mechanical Properties of Mg-Zn-RE Alloys

作　　者：张大华[1] 陈体军[1] 徐轲[1] 赵黎明[1] 侯凤刚[1] 周游[1] 

机构地区：[1]兰州理工大学甘肃省有色金属新材料省部共建国家重点实验室,兰州730050

出　　处：《有色金属与稀土应用》2009年第2期32-36,共5页Non-Ferrous Metals & Rareearth

摘　　要：采用金相显微镜、扫描电镜、X-射线衍射仪以及电子万能拉伸实验机等设备研究、分析了Zr对Mg—Zn—RE镁合金的显微组织和力学性能的影响。结果表明：Zr元素对合金组织有明显的晶粒细化作用，Zr改善了合金的组织，提高了合金的力学性能。并且当Zr加入量为0．3％时合金的力学性能最佳：抗拉强度达到207MPa，伸长率达到16．9％。Zr的加入使合金断裂方式由准解理断裂向韧性断裂转变。The effects of Zr on microstructure and mechanical properties of Mg-Zn-RE magnesium alloys were observed and analyzed by using metallographic microscope, scanning electron microscopy （SEM）, X-ray diffraction （XRD） and electronic universal materials testing machine. The results show that the grain of alloys is obviously refined with the addition of Zr. At the same time the mechanical properties of experiment alloys are improved with Zr content increasing. In particular the tensile strength and elongation were conspicuous increase when added Zr with 0.3% to peak 207MPa and 16.9%.

关 键 词：Mg—Zn—RE合金 ZR 晶粒细化 显微组织 力学性能 

分 类 号：TG146.21[一般工业技术—材料科学与工程] TM273[金属学及工艺—金属材料]