文献类型：期刊文献

英文题名：Cyclic deformation behaviors and damage mechanisms in P92 steel under creep-fatigue loading: Effects of hold condition and oxidation

作者：Wang, Kang-Kang[1];Wen, Jian-Feng[1];Wang, Run-Zi[2,3];Ye, Ting[4];Wang, Ji[1];Tan, Jian-Ping[1];Chen, Hao-Feng[1];Zhang, Xian-Cheng[1];Tu, Shan-Tung[1]

机构：[1]East China Univ Sci & Technol, Key Lab Pressure Syst & Safety MOE, 130 Meilong Rd, Shanghai 200237, Peoples R China;[2]Tohoku Univ, Adv Inst Mat Res WPI AIMR, Core Res Cluster Mat Sci CRCMS, Sendai 9808577, Japan;[3]Tohoku Univ, Grad Sch Engn, Dept Mat Proc, Sendai 9808579, Japan;[4]Longyan Univ, Coll Phys & Electromech, 1 Dongxiao North Rd, Longyan 364012, Peoples R China

年份：2024

卷号：187

外文期刊名：INTERNATIONAL JOURNAL OF FATIGUE

收录：;EI(收录号：20242516277799);WOS:【SCI-EXPANDED(收录号:WOS:001258951600001)】；

基金：Financial supports from the National Natural Science Foundation of China (52122506 and 51875203) , the National Science and Technology Major Project (J2019 -IV -0010-0078) , the Shanghai Gaofeng Project for University Academic Program Development and the Program of Oriental Scholars of Shanghai Universities are gratefully acknowledged. Dr. Run- Zi Wang also gratefully acknowledges the support of Structure and Environmental Resistant Area in the Core Research Cluster for Material Science (CRCMS) of Tohoku University.

语种：英文

外文关键词：P92 steel; Creep; Fatigue; Oxidation; Damage mechanism

摘要：P92 steel has gained plenty of attention as a top contender for steam generator components and main steam tubes due to the growing need to increase the energy conversion efficiency. However, a major contributor to the premature failure of these components remains the interaction of creep and fatigue damage caused by typical dwell fatigue loading conditions. In this study, creep-fatigue tests of P92 steel were conducted under straincontrolled cyclic loading including hold durations up to 3600 s at 873 K in air. Special attention was given to the influence of hold conditions and oxidation on cyclic deformation and damage mechanisms. The results revealed that introducing hold time substantially decreased the failure life, with compressive hold causing more severe damage than tensile hold. Additionally, oxidation became severer with longer hold time, resulting in increased surface roughness, crack initiation sites and density of secondary cracks. Fatigue dominated the failure in the case of the short-term tensile hold, and the interaction of creep, fatigue and oxidation dominated the failure in long-term tensile hold tests. In contrast, the failure in compressive hold case was dominated by fatigue and severe oxidation. Furthermore, a three-dimensional oxidation-creep-fatigue damage interaction diagram was proposed for quantitative assessments in practice.