Study on Effect of Hydrogen Environment on Stress Corrosion Cracking of Retaining Ring in Hydrogen-cooled Generator

被引：0

作者：

Zhang Qian ^{[1
]}

Tian Song-feng ^{[1
]}

Fang Lin-tie ^{[1
]}

Ma Dong-dong ^{[1
]}

机构：

[1] N China Elect Power Univ, Dept Power Engn, Baoding 071003, Hebei Province, Peoples R China

来源：

FUTURE MATERIAL RESEARCH AND INDUSTRY APPLICATION, PTS 1 AND 2 | 2012年 / 455-456卷

关键词：

hydrogen-cooled generator; retaining ring; hydrogen environment; stress corrosion cracking;

D O I：

10.4028/www.scientific.net/AMR.455-456.369

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In hydrogen-cooled generator, the quality of hydrogen environment directly affects generator's operating especially the retaining ring. In order to research the relationship between the hydrogen environment and stress corrosion of material, the metallographic analysis is held for retired retaining ring of a power plant. There were intergranular and transcrystalline cracks, similar with hydrogen embrittlement. Designed generating system of occurrence for wet hydrogen, hydrogen charging is operated to retaining ring material used in tensile test, and then observed fracture by scanning electron microscope. The results showed that fracture was including cleavage, dimple and secondary crack caused by hydrogen-induced lagging plastic deformation.

引用

页码：369 / 373

页数：5