J. Mater. Sci. Technol. ›› 2010, Vol. 26 ›› Issue (2): 131-135.

• Research Articles • 上一篇    下一篇

Effects of oxygen on the microstructure of Ti48Al1B alloys

马颖澈1;Jiang Zhiguo2;陈波3;Gao Ming4;Zhao Xiujuan4;Liu Kui2;Li Yiyi2   

  1. 1. 中科院金属研究所
    2. Institute of Metal Research; Chinese Academy of Sciences
    3. 中科院金属所
    4. Institute of Metal Research; Chinese Academy of Sciences;
  • 收稿日期:2008-10-08 修回日期:2008-12-29 出版日期:2010-02-28 发布日期:2010-02-28
  • 通讯作者: 马颖澈

Effects of Oxygen on the Microstructure of Ti47Al0:7B Alloys

Yingche Ma, Zhiguo Jiang, Bo Chen, Xiujuan Zhao, Ming Gao, Kui Liu, Yiyi Li   

  1. Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
  • Received:2008-10-08 Revised:2008-12-29 Online:2010-02-28 Published:2010-02-28
  • Contact: Yingche Ma

Abstract:

The effects of oxygen on the microstructure of Ti-47Al-0.7B (at. pct) alloy for as-cast automotive valves were investigated. Six alloys with oxygen content from 0.4 to 1.4 at. pct were prepared by induction melting and centrifugal casting in CaO crucible under protective atmosphere. The microstructures were observed by optical microscopy (OM) and scanning electron microscope (SEM). The results show that the increase of oxygen content led to grain refinement and enhanced the microhardness as well as the α2 volume fraction in the TiAl-based alloys.

Key words: Microstructure, Oxygen content, Grain refinement, TiAl-based alloys