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

Qian Zhang; Song Feng Tian; Lin Tie Fang; Dong Dong Ma

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

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 455-456Study on Effect of Hydrogen Environment on Stress...

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

Abstract:

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.

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Periodical:

Advanced Materials Research (Volumes 455-456)

Pages:

369-373

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.455-456.369

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Online since:

January 2012

Authors:

Qian Zhang, Song Feng Tian, Lin Tie Fang, Dong Dong Ma

Keywords:

Hydrogen Environment, Hydrogen-Cooled Generator, Retaining Ring, Stress Corrosion Cracking (SCC)

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References

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