锆合金包层碘致应力腐蚀开裂的影响因素及机理：综述

李雨莎; 葛昌纯; 刘艳红; 李光彬; 董晓旭; 顾宗兴; 张迎春

doi:10.1007/s12613-022-2431-6

Volume 29 Issue 4

Apr. 2022

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文章导航 > 矿物冶金与材料学报（英文） > 2022 > 29(4): 586-598

Yusha Li, Changchun Ge, Yanhong Liu, Guangbin Li, Xiaoxu Dong, Zongxing Gu, and Yingchun Zhang, Influencing factors and mechanism of iodine-induced stress corrosion cracking of zirconium alloy cladding: A review, Int. J. Miner. Metall. Mater., 29(2022), No. 4, pp. 586-598. https://doi.org/10.1007/s12613-022-2431-6

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Yusha Li, Changchun Ge, Yanhong Liu, Guangbin Li, Xiaoxu Dong, Zongxing Gu, and Yingchun Zhang, Influencing factors and mechanism of iodine-induced stress corrosion cracking of zirconium alloy cladding: A review, Int. J. Miner. Metall. Mater., 29(2022), No. 4, pp. 586-598. https://doi.org/10.1007/s12613-022-2431-6

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特约综述

锆合金包层碘致应力腐蚀开裂的影响因素及机理：综述

1)
北京科技大学材料科学与工程学院，北京 100083，中国
2)
国家电投集团科学技术研究院有限公司，北京 102209，中国

通讯作者:
葛昌纯 E-mail: ccge@mater.ustb.edu.cn

张迎春 E-mail: zhang@ustb.edu.cn

文章亮点

(1) 系统地总结了锆合金发生碘致应力腐蚀开裂的机理。

(2) 系统地总结了锆合金发生碘致应力腐蚀开裂的影响因素。

(3) 提出了改善锆合金碘致应力腐蚀开裂的途径。

中文摘要

因碘致应力腐蚀开裂(I-SCC)导致的锆合金包壳失效会增加裂变产物泄漏的风险。已在大量已发表的文献中对I-SCC的进展进行了全面调查。为了可以更加全面的了解I-SCC，本综述重点总结了锆合金发生I-SCC的机制和影响因素。结果表明，由于碘与锆的反应，锆合金表面形成了微坑，然后微坑逐渐聚集形成坑簇。裂纹很容易在凹坑簇中产生并沿晶界扩展。达到特定条件后，裂纹将转变为穿晶方向扩展。随着裂纹的发展，最终形成韧性断裂。我们还总结了可能影响 I-SCC的各种因素，包括碘浓度、温度、微观结构和合金元素等元素。尽管如此，锆合金的抵抗I-SCC性能的改善仍需进一步探索；并且可以更多地关注材料性能，如合金元素、微观结构和表面处理，以提高锆合金的抗I-SCC性能。

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Invited Review

Influencing factors and mechanism of iodine-induced stress corrosion cracking of zirconium alloy cladding: A review

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Abstract

Abstract

Failure of the zirconium alloy claddings due to iodine-induced stress corrosion cracking (I-SCC) will increase the risk of fission product leakage. The progress of I-SCC has been comprehensively investigated in a massive amount of published literature. For a comprehensive understanding of I-SCC, this review focuses on summarizing the mechanisms and influencing factors of I-SCC. Results show that micropits are formed on the surface of zirconium alloys due to the reaction between iodine and zirconium, and then small pits gradually gather to form pit clusters. Cracks are easily generated in pit clusters and propagate along the grain boundary. After reaching a particular condition, the crack will transform into transgranular direction propagation. As the crack develops, it finally becomes a ductile fracture. We also summarize various factors that may affect I-SCC. The specific cracking conditions are linked to elements, such as iodine concentration, temperature, microstructure, and alloying elements. Nonetheless, the improvement of the I-SCC resistance of zirconium alloys needs to be further explored. More attention can be paid to material properties, such as alloying elements, microstructure, and surface treatment, to improve the I-SCC resistance of zirconium alloys.
- iodine-induced stress corrosion cracking;
- zirconium;
- fracture

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