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J. Mater. Sci. Technol. 2010, 26(02) 131-135 DOI:     ISSN: 1005-0302 CN: 21-1315/TG
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Keywords
Microstructure
Oxygen content
Grain refinement
TiAl-based alloys
Authors
MA Ying-Che
ZHIGUO -Jiang
CHEN Bei
MING -Gao
XIUJUAN -Zhao
KUI -Liu
LI -Yiyi
PubMed
Article by Ma,Y.C
Article by Zhiguo,.J
Article by Chen,b
Article by Ming,.G
Article by Xiujuan,.Z
Article by Kui,.L
Article by Li,.Y

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

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

Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China

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.

Keywords： Microstructure   Oxygen content   Grain refinement   TiAl-based alloys  
Received 2008-10-08 Revised 2008-12-29 Online: 2010-02-28 
DOI:
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Corresponding Authors: Yingche Ma
Email: ycma@imr.ac.cn
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References：
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