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Report No.
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The Effects of residual stress on corrosion behavior of ion irradiated type 316L stainless steel

Kondo, Keietsu ; Miwa, Yukio; Okubo, Nariaki  ; Kaji, Yoshiyuki ; Tsukada, Takashi 

The effect of residual stress on corrosion behavior in type 316L austenitic stainless steel was examined by ion irradiated specimens. Ion irradiation was performed on specimens both undeformed and deformed plastically by bending constrait at 330$$^{circ}$$C to average displacement damage from 1 to 45dpa. It was observed in EPR testing that deformed specimens showed higher corrosion resistance than undeformed specimens. Three-dimensional atom probe analysis was conducted on irradiated specimens. It was found that the enrichment of Ni, Si and the depletion of Cr at dislocations, and the degree of segregation was greater in undeformed specimen than in deformed specimen. It could be suggested that radiation induced segregation behavior of solute atoms as a consequence of diffusion and annihilation of irradiation defects at sink is affected by residual stress, and this also might affect the corrosion resistance.

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