New insights into stress corrosion cracking mechanism of Alloy 600 in boiling water reactor (BWR) environment

Pan Liu, Yunlong Wu, Xiangyu Zhong, Ken Oyama, Seiya Ogota, Jun Chai, Yutaka Watanabe, Tetsuo Shoji

研究成果: ジャーナルへの寄稿学術論文査読

抄録

Several mechanisms have been proposed to explain the intergranular stress corrosion cracking (IGSCC) of Alloy 600 in BWR, but slip-dissolution at grain boundaries remains the most recognized cause. However, it is still uncertain whether the above degradation is accompanied by selective internal oxidation (SIO) as a precursor. Following new insights into the creviced bent beam (CBB) test, relevant evidence was discovered. Additionally, the results of First Principle Calculation indicate interstitial O actively competes for chromium in IG carbides to form chromium oxides during the SIO process, instead of passively waiting for the oxidation/decomposition of carbides to provide a chromium source.

本文言語英語
論文番号112008
ジャーナルCorrosion Science
232
DOI
出版ステータス出版済み - 2024 5月 15

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