Morphology of stress corrosion cracking due to exposure to high-temperature water containing hydrogen peroxide in stainless steel specimens with different crevice lengths

Nakano, Junichi; Sato, Tomonori ; Kato, Chiaki ; Yamamoto, Masahiro ; Tsukada, Takashi ; Kaji, Yoshiyuki

Crack growth tests were performed in high-temperature water containing hydrogen peroxide (H $_{2}$ O $_{2}$ ) to evaluate the relationships between the crevice structure and H $_{2}$ O $_{2}$ on stress corrosion cracking (SCC) growth morphology of stainless steel (SS). Small compact tension (CT) specimens with different fatigue pre-crack lengths were prepared. 20300 ppb H $_{2}$ O $_{2}$ was injected into the high-temperature water at 561 K. Intergranular SCC (IGSCC) was observed only near the side grooves of the CT specimens. Owing to pre-crack shortening, the IGSCC area expanded to the central region of the CT specimens. The effects of H $_{2}$ O $_{2}$ on SS appeared intensely near the surfaces exposed to high levels of H $_{2}$ O $_{2}$ . The calculations for the percentage of H $_{2}$ O $_{2}$ remaining showed that the effects of H $_{2}$ O $_{2}$ flowed from both sides of the crack were more obvious than those flowed from the crack mouth.

Language	:	English
Journal	:	Journal of Nuclear Materials
Volume	:	441
Number	:	1-3
Pages	:	p.348 - 356
Publication Year/Month	:	2013/10
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Paper URL	:	https://doi.org/10.1016/j.jnucmat.2013.05.073
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Keywords	:	no keyword
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Registration No. : AA20120703
JAEA Abstracts No. : 41001088
Paper Submission No. : 13087

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