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材料工程  2015, Vol. 43 Issue (1): 66-71    DOI: 10.11868/j.issn.1001-4381.2015.01.012
  材料与工艺 本期目录 | 过刊浏览 | 高级检索 |
Y微合金化高铌TiAl基合金微观组织研究
王艳晶, 柳乐, 宋玫锦
沈阳航空航天大学 材料科学与工程学院, 沈阳 110136
Microstructure of Y Micro-alloying TiAl Based Alloy with High Nb Content
WANG Yan-jing, LIU Le, SONG Mei-jin
College of Material Science and Engineering, Shenyang Aerospace University, Shenyang 110136, China
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摘要 采用真空非自耗电弧炉制备了名义成分为Ti-45Al-8Nb-xY(x=0,0.1,0.3,原子分数/%,下同)的合金,利用光学显微镜(OM)、扫描电镜(SEM)、X射线衍射仪(XRD)及能谱分析仪(EDS)观察了Y的添加与均匀化热处理制度对合金组织的影响.结果表明:稀土Y可以细化(α2+γ)层片团,较多的Y加入量(0.3%)细化效果显著;Y在合金中可形成分布在层片团晶内和晶界的粒状及棒状Y2O3和YAl2相;Y提高了Ti-45Al-8Nb合金的Tα转变温度,使同一均匀化热处理工艺下三种高铌TiAl基合金的组织差别较大.
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王艳晶
柳乐
宋玫锦
关键词 高铌TiAl合金Y微合金化均匀化处理微观组织    
Abstract:The nominal composition of Ti-45Al-8Nb-xY(x=0,0.1,0.3,atom fraction/%) alloys was prepared by the non-pole-consuming vacuum arc furnace. The effect of Y addition and different homogenization treatments on the microstructure of the TiAl-based alloys with high Nb content was investigated by using the optical microscope (OM), scanning electronic microscope (SEM), X-ray diffraction (XRD), energy dispersive spectroscope (EDS). The results show that (α2+γ) lamellar colonies are refined by the element Y and the refining effect is improved with the increase of Y addition. The Y distributes along the grain boundaries and internal of lamellar colonies in the form of Y2O3 and YAl2 particles. The increase of phase transformation temperature Tα caused by the Y addition results in different microstructures formed in the TiAl-based alloys with high Nb content on the same homogenization process.
Key wordshigh Nb containing TiAl alloy    Y micro-alloying    homogenization treatment    microstructure
收稿日期: 2013-05-28      出版日期: 2015-01-20
中图分类号:  TG146.2+3  
基金资助:国家自然科学基金资助项目(50801047)
通讯作者: 王艳晶(1973—),女,博士,副教授,目前从事Ti合金及TiAl基合金的研究工作,联系地址:辽宁省沈阳市道义经济开发区道义南大街37号沈阳航空航天大学材料科学与工程学院(110136),wangyj2008@gmail.com     E-mail: wangyj2008@gmail.com
引用本文:   
王艳晶, 柳乐, 宋玫锦. Y微合金化高铌TiAl基合金微观组织研究[J]. 材料工程, 2015, 43(1): 66-71.
WANG Yan-jing, LIU Le, SONG Mei-jin. Microstructure of Y Micro-alloying TiAl Based Alloy with High Nb Content. Journal of Materials Engineering, 2015, 43(1): 66-71.
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http://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2015.01.012      或      http://jme.biam.ac.cn/CN/Y2015/V43/I1/66
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