当前位置: X-MOL 学术Corros. Eng. Sci. Technol. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Si segregation and relevant effect on the corrosion propagation in F/M steel exposed to liquid lead-bismuth eutectic
Corrosion Engineering, Science and Technology ( IF 1.8 ) Pub Date : 2022-08-30 , DOI: 10.1080/1478422x.2022.2115436
Rui Yuan 1 , Jiajian Shi 1 , Jinxue Yang 2 , Yingxue Chen 3 , Guoqiang Huang 1 , Chenyang Lu 2 , Feifei Zhang 3 , Fanqiang Meng 1
Affiliation  

ABSTRACT

Clarification of the relationship between oxygen diffusion and microstructural evolution in liquid lead-bismuth eutectic (LBE) is of great importance for understanding and consequently tailoring the oxidation process. In the present study, a Si-modified ferritic martensitic steel was exposed to oxygen-saturated LBE at 500°C at various times and the interface between the internal oxidation zone and matrix was investigated. Microstructural characterisation reveals that grain boundaries and martensitic lath boundaries provide a fast pathway for oxygen diffusion, resulting in the high amount of oxidation products, as well as cracks. The internal stress caused by the formation of oxidation products along grain boundary results in the proliferation of dislocations, which subsequently play as the new diffusion channel for oxygen. The chemical analysis demonstrates that Si preferably concentrates along the dislocations in a form of Si-rich oxide, suggesting the oxidation of Si is prior to the Cr-rich oxide.



中文翻译:

Si偏析及其对液态铅铋共晶F/M钢腐蚀扩展的影响

摘要

澄清液态铅铋共晶 (LBE) 中氧扩散与微观结构演化之间的关系对于理解并因此调整氧化过程非常重要。在本研究中,Si 改性铁素体马氏体钢在不同时间暴露于 500°C 的氧饱和 LBE,并研究了内部氧化区和基体之间的界面。微观结构表征表明,晶界和马氏体板条边界为氧扩散提供了快速通道,从而导致大量的氧化产物以及裂纹。沿晶界形成氧化产物引起的内应力导致位错扩散,随后成为氧的新扩散通道。

更新日期:2022-08-30
down
wechat
bug