闫亮明,刘玉浩,石阁,孙健,李小刚.均匀化对Mg-5.9Zn-1.6Zr-1.6Nd-0.9Y合金组织性能的影响[J].稀有金属材料与工程,2018,47(5):1393~1398.[Yan Liangming,LIU Yuhao,SHI Ge,SUN Jian,LI Xiaogang.Effect of homogenization on microstructure and mechanical property of Mg-5.9Zn-1.6Zr-1.6Nd-0.9Y alloy[J].Rare Metal Materials and Engineering,2018,47(5):1393~1398.]
均匀化对Mg-5.9Zn-1.6Zr-1.6Nd-0.9Y合金组织性能的影响
投稿时间:2017-11-09  修订日期:2017-12-11
中文关键词:  Mg-5.9Zn-1.6Zr-1.6Nd-0.9Y合金  均匀化  显微组织  硬度
基金项目:
中文摘要:
      分别利用差热分析、光学显微镜、扫描电子显微镜、能谱仪、X射线衍射仪等仪器对Mg-5.9Zn-1.6Zr-1.6Nd-0.9Y合金在其均匀化过程中,产生的微观组织演变进行了系统性的定性分析。在此基础上,测量了维氏硬度,定量化的分析合金的硬度变化。结果发现,Mg-5.9Zn-1.6Zr-1.6Nd-0.9Y合金的铸态组织由ɑ- Mg和Mg3(Y、Nd)2Zn3构成。合金在均匀化处理之前,拥有510℃的吸热峰,但是此吸热峰在合金在500°C×16小时的均匀化少量Mg3消失(Y、Nd)2Zn3相溶于470℃和490℃。然而,在500℃×16 h均匀化处理后,只有一小部分的富Y和富Nd细颗粒(MG3(Y,Nd)2Zn3)分散在晶界,基本消除了枝晶偏析。因此,最佳化参数为500℃16小时均能有效降低铸Mg-5.9Zn-1.6Zr-1.6Nd-0.9Y合金的硬度从185.2HV升高到144.2 HV。
Effect of homogenization on microstructure and mechanical property of Mg-5.9Zn-1.6Zr-1.6Nd-0.9Y alloy
英文关键词:Mg-5.9Zn-1.6Zr-1.6Nd-0.9Y alloy  homogenization  microstructure  hardness
英文摘要:
      The microstructure evolution of Mg-5.9Zn-1.6Zr-1.6Nd-0.9Y alloy during homogenization was investigated by differential thermal analysis, optical microscopy, scanning electron microscopy, energy dispersive spectroscopy, X-Ray diffraction. Also, the Vikers hardness was measured. It was found that the microstructure of as-cast Mg-5.9Zn-1.6Zr-1.6Nd-0.9Y alloy consists of α-Mg, and Mg3(Y,Nd)2Zn3 phases.The alloy has an endothermic peak at 510 ℃ before homogenization. The endothermic peak disappears in the alloy homogenized at 500 °C for 16 h. A small quantity of Mg3(Y,Nd)2Zn3 phases dissolve at 470 ℃ and 490 ℃.However, after homogenization at 500 ℃ for 16 h, there are only a small number of rich-Y and rich-Nd fine particles (Mg3(Y,Nd)2Zn3) dispersing at grain boundary, and dendritic segregation is almost eliminated. Therefore, the optimum homogenization parameter is 500 ℃ for 16 h. Homogenization can effectively decrease the hardness of the as-cast Mg-5.9Zn-1.6Zr-1.6Nd-0.9Y alloy from 185.2 HV to 144.2 HV.
作者单位E-mail
闫亮明 内蒙古工业大学 57374138@qq.com 
刘玉浩 内蒙古工业大学 912189951@qq.com 
石阁 内蒙古工业大学  
孙健 内蒙古工业大学  
李小刚 内蒙古工业大学  
摘要点击次数: 183
全文下载次数: 44
查看全文  查看/发表评论  下载PDF阅读器
关闭