冷却方式对Mg-3Nd合金显微组织和物相构成的影响  

Effect of microstructure and phase composition of Mg-3Nd alloy on cooling-down method

作　　者：郑成菊[1] 张继元[1] 刘双丽[1] 刘喜明[1] 

机构地区：[1]长春工业大学材料表面工程研究所,吉林长春130012

出　　处：《长春工业大学学报》2005年第3期173-176,共4页Journal of Changchun University of Technology

基　　金：吉林省杰出青年基金资助项目(吉科合字第20030128号)

摘　　要：制备了急冷和铸造的Mg-3mass%Nd合金,采用显微组织分析、X-射线物相分析、电子探针微区成分分析、硬度和强度等检测分析,研究了合金的显微组织、物相构成和力学性能。探讨了压缩变形对铸态合金组织和性能的影响。结果表明,急冷可以大幅度减小晶粒尺度及改变合金的物相构成。急冷合金的物相构成为过饱和-αMg固溶体相;铸态样品的物相构成为-αMg固溶体和Mg41Nd5。实验还表明,铸态样品压缩变形后产生大量的形变孪晶,提高了合金的强度。Melt-spin and as-cast Mg-3Nd alloy samples were prepared. The microstructures of the samples were observed and measured using metallographic analysis, X-ray diffraction （XRD）, energy dispersive spectroscopy （EDX）, and Vickers hardness and tensile strength, respectively. Effect of compression deformation on microstructure and mechanical properties of cast state sample was discussed. The crystalline grain size was greatly decreased of the melt-spin sample, and the main phase is supersaturated α-Mg solid solution. The cast states are composed of α-Mg and Mg41Nd5. Many twins in the microstructure were observed by compression deformation of cast Mg-3Nd alloy, and the properties of materials were increased in partly field.

关 键 词：金属材料 Mg-Nd合金 形变孪晶 显微组织 力学性能 

分 类 号：TG146.2[一般工业技术—材料科学与工程]