文献类型：期刊文献

英文题名：Stress corrosion crack propagation affected by microstructures for nuclear steam turbine rotor steels in the simulated environment

作者：Weng, Shuo[1,2,3];Huang, Yuhui[4];Lin, Shuxian[4];Xuan, Fu-Zhen[4]

机构：[1]Univ Shanghai Sci & Technol, Sch Mech Engn, Shanghai 200093, Peoples R China;[2]Univ Shanghai Sci & Technol, Machinery Ind Key Lab Mech Strength & Reliabil Ev, Shanghai 200093, Peoples R China;[3]Shanghai Technol Serv Platform Reliabil Evaluat N, Shanghai, Peoples R China;[4]East China Univ Sci & Technol, Sch Mech & Power Engn, Shanghai 200237, Peoples R China

年份：2022

卷号：17

起止页码：725

外文期刊名：JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T

收录：;EI(收录号：20220411515634);WOS:【SCI-EXPANDED(收录号:WOS:000820642200001)】；

基金：The work was sponsored by the National Natural Science Foundation of China (Grant No. 51875202 and 52005336), Shanghai Sailing Program (19YF1434400).

语种：英文

外文关键词：CrNiMoV steel; Stress corrosion crack; Propagation path; Crack growth rate

摘要：The propagation behavior of stress corrosion cracking (SCC) for two CrNiMoV steels in the simulated environment of low-pressure nuclear steam turbine rotor was systematically investigated by microstructural characterizations, electrochemical measurements, slow strain rate tensile tests, and crack growth rate (CGR) measurements. The results showed that both the corrosion susceptibility and stress corrosion susceptibility increased with the increase of localized residual strain, yield strength, and the decrease of grain size. With the higher stress corrosion susceptibility, the SCC CGR of Steel A was higher than Steel B in the corrosive solution at 80 degrees C, however, at 180 degrees C the SCC CGR of Steel A was lower than Steel B under the lower applied K. The change of SCC CGR was strongly affected by crack branches, crack deflections and plastic deformation during the SCC propagation, which may have some correlations with the microstructural distribution. (C) 2022 The Author(s). Published by Elsevier B.V.