Effect of microstructure on corrosion characteristics of Zr-5Nb alloy

被引:0
作者
Kim, Hyun-Gil [1 ]
Choi, Byoung-Kwon [1 ]
Cho, Hai-Dong [2 ]
Park, Jeong-Yong [1 ]
Jeong, Yong-Hwan [1 ]
机构
[1] Korea Atom Energy Res Inst, Fus Technol Div, Taejon 305353, South Korea
[2] Korea Atom Energy Res Inst, Nucl Mat Res Div, Taejon 305353, South Korea
来源
JOURNAL OF THE KOREAN INSTITUTE OF METALS AND MATERIALS | 2008年 / 46卷 / 08期
关键词
zirconium alloy; corrosion; microstructure; beta-phase; fuel cladding;
D O I
暂无
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
For a better understanding of the correlation between a corrosion and a microstructure, it is necessary to study a phase transformation with an annealing condition for Zr-Nb alloy. Zr-5wt.%Nb alloy with different phase characteristics was prepared with various annealing conditions. A microstructural study and corrosion test were performed to investigate the effect of a phase such as the phase type, fraction, and size on corrosion. The corrosion behavior of the Zr-5Nb alloy was very sensitive to the annealing condition, which affected the formation of the beta-phases (beta-Nb or beta-Zr). The corrosion rate of the Zr-5Nb alloy annealed at 500 degrees C with the formation of the beta-Nb phase was lower than that of the Zr-5Nb alloy annealed from 600 to 800 degrees C with the formation of the beta-Zr phase. The highest corrosion rate was observed for the beta-quenched Zr-5Nb alloy. After a consideration of the corrosion rate and microstructure of the Zr-5Nb alloy, the corrosion resistance of that alloy was improved due to the formation of a small sized beta-Nb phase which could be controlled by the annealing condition.
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页码:482 / 488
页数:7
相关论文
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