Effect of Surface Grinding on Residual Stress in Low Carbon Austenitic Stainless Steel SUS316L
中東 重雄 Shigeo NAKAHIGASHI 山本 厚之 Atsuyukitu YAMAMOTO 山田 孝行 Takayuki YAMADA 劉 莉 Lin LIU 寺澤 倫孝 Mititaka TERASAWA 三田村 徹 Tohru MITAMURA 椿野 晴繁 Harushige TSUBAKINO 菖蒲 敬久 Takahisa SHOBU 秋庭 義明 Yoshiaki AKINIWA
SPring-8 stress corrosion cracking stress measurement SUS316L synchrotron radiation
Suppressing the stress corrosion cracking by reducing carbon contents in austenitic stainless steels seems to be not effective on core shrouds used in boiling water reactor in Japan. Trans-granul ar cracking was found out in the shrouds. To clarify a mechanism of the cracking, stress measurement on specimens under stretched condition in hot water has been attempted in the present study. A n in-situ device for diffraction measurements in synchrotron radiation facility has been developed by the present authors, and the experiments have been carried out in SPring-8. The specimen of S US316 steel was solution heat treated and surface-ground. Side inclination method was applied for measuring stress exerted in the specimen. A 20 -sin? plot showed that tensile stress was induced.