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.

引用

页码：482 / 488

页数：7