文献类型：期刊文献

英文题名：Effect of low-cycle fatigue behavior on corrosion of welded joint in simulated environment of low pressure nuclear steam turbine

作者：Weng, Shuo[1]; Huang, Yuhui[1]; Xuan, Fuzhen[1]

机构：[1] Key Laboratory of Pressure Systems and Safety [MOE], School of Mechanical and Power Engineering, East China University of Science and Technology, 130, Road Meilong, Shanghai, 200237, China

年份：2018

卷号：2018-April

外文期刊名：NACE - International Corrosion Conference Series

收录：EI(收录号：20183905849315)

语种：英文

外文关键词：Scanning - Steam turbines - Microstructure - Pressure effects - Transmission electron microscopy - Corrosion resistance - Low-cycle fatigue - Fatigue damage - Scanning electron microscopy

摘要：The effect of microstructure evolution induced by low-cycle fatigue behavior on the corrosion of welded joint in the simulated environment of low pressure nuclear steam turbine was comprehensively investigated. The microstructure evolution was observed through optical microscope (OM), scanning electron microscope (SEM) and transmission electron microscope (TEM). Corrosion susceptibility of welded joint was examined by traditional electrochemical measurement and scanning vibrating electrode technique (SVET) measurement. The traditional electrochemical results showed that weld metal was the most susceptive zone with the lowest corrosion potential and the highest corrosion current density in the welded joint, which was in consistence with the results of SVET. In addition, the corrosion resistance of each zone in the post-low-cycle fatigue specimens was higher than that of as-received specimens, which was caused by the lower dislocation density due to low-cycle fatigue behavior. ? 2018 by NACE International.