稀土元素对镁合金晶粒细化的研究(新)
Effects of rare earth addition on the grain refinement in magnesium alloys
袁付庆，张静，方超
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作者单位：重庆大学 材料科学与工程学院 国家镁合金材料工程技术研究中心，重庆 400044
中文关键字：镁合金；稀土；晶粒细化；固溶度
英文关键字：magnesium alloys; rare earth; grain refining; solid solubility
中文摘要：根据稀土元素在镁合金中存在形式及其作用，综述了稀土Ce、Nd、Y、Er及Sc在镁合金中的晶粒细化效果及其作用机理。一定量的Ce、Nd、Y、Er及Sc对镁合金晶粒均有细化作用，根据稀土固溶度的不同，其细化合金晶粒所加入的量也不同；比较发现镁合金晶粒开始粗化时所添加的稀土量是随着其在镁合金中的固溶度增加而增大的
英文摘要：Grain refinement performance and mechanism of rare-earth (Re) addition in magnesium alloys were reviewed by analysing the existing form and efficiency of various Re, including Ce、Nd、Y、Er and Sc. It was revealed that the grain size of magnesium alloys could be refined by a certain amount of Re additon. The optimum amount for grain refinement was determined by the solid solubility of Re in Mg matrix. It was summarized that the critical value of Re addition beyond which the grains get coarsing increased with its solid solubility in Mg