文献类型：期刊文献

英文题名：A crystal plasticity-based approach for creep-fatigue life prediction and damage evaluation in a nickel-based superalloy

作者：Li, Kai-Shang[1];Wang, Run-Zi[1];Yuan, Guang-Jian[1];Zhu, Shun-Peng[2];Zhang, Xian-Cheng[1];Tu, Shan-Tung[1];Miura, Hideo[3]

机构：[1]East China Univ Sci & Technol, Key Lab Pressure Syst & Safety, Minist Educ, Shanghai 200237, Peoples R China;[2]Univ Elect Sci & Technol China, Sch Mech & Elect Engn, Chengdu 611731, Peoples R China;[3]Tohoku Univ, Grad Sch Engn, Fracture & Reliabil Res Inst, Sendai, Miyagi 9808579, Japan

年份：2021

卷号：143

外文期刊名：INTERNATIONAL JOURNAL OF FATIGUE

收录：;EI(收录号：20204509466485);WOS:【SCI-EXPANDED(收录号:WOS:000599499000002)】；

基金：This work was supported financially by the National Key Research and Development Program of China (2018YFC1902404), the National Natural Science Foundation of China (Nos. 51725503 and 51975214) and 111 Project. Zhang XC is also grateful for the Innovation Program of Shanghai Municipal Education Commission (2019-01-07-00-02-E00068). Wang RZ and Miura H also gratefully acknowledge the supports of the Postdoctoral Fellowships for Research in Japan (FY2020 P20350) by the Japan Society for the Promotion of Science (JSPS).

语种：英文

外文关键词：Creep-fatigue; Crystal plasticity; Life prediction; Damage diagram

摘要：A numerical process based on crystal plasticity finite element (CPFE) was implemented to predict creep-fatigue crack initiation life. CPFE-based model can describe the macroscopic cyclic deformation and reveal grain-level damage mechanism. A new life prediction approach was then constructed by introducing fatigue and creep indicator parameters. Furthermore, a series of strain-controlled creep-fatigue tests in GH4169 superalloy at 650 degrees C were used to validate predicted accuracy of this model, where most of the data points lied within +/- 1.5 error band. Finally, a potential methodology for conservative creep-fatigue life evaluation was provided by flexible creep-fatigue damage summation rule in engineering applications.