文献类型：期刊文献

英文题名：Impact of residual stress on high and very high cycle fatigue behaviours of Inconel 718 at room temperature and 650 °C

作者：Wang, Yong-Jie[1];Hu, Hua-Yan[2];Yang, Yi-Fan[1];Dong, Nai-Jian[1];Nie, Xiang-Fan[3];Wen, Jian-Feng[1,4];Song, Miao[2];Chen, Yong-Hui[5];Tu, Shan-Tung[1,4]

机构：[1]East China Univ Sci & Technol, Sch Mech & Power Engn, Key Lab Pressure Syst & Safety, Minist Educ, Shanghai 200237, Peoples R China;[2]Shanghai Jiao Tong Univ, Sch Nucl Sci & Engn, Shanghai 200240, Peoples R China;[3]Air Force Engn Univ, Sci & Technol Plasma Dynam Lab, Xian 710038, Peoples R China;[4]Shanghai Inst Aircraft Mech & Control, 130 Meilong Rd, Shanghai 200237, Peoples R China;[5]Aircraft Strength Res Inst China, Natl Key Lab Strength & Struct Integr, Xian 710065, Peoples R China

年份：2025

卷号：200

外文期刊名：INTERNATIONAL JOURNAL OF FATIGUE

收录：;EI(收录号：20252518650406);WOS:【SCI-EXPANDED(收录号:WOS:001517103900001)】；

基金：We gratefully acknowledge the financial support of the National Natural Science Foundation of China (No. 52122506, 52475156 & 12275176) , the National Science and Technology Major Project (J2019-V -0010-0078) , the Shanghai Gaofeng Project for University Academic Program Development and the Program of Oriental Scholars of Shanghai Universities. We also acknowledge the access to microscopes at the Instrumental Analysis Center at Shanghai Jiao Tong University.

语种：英文

外文关键词：Inconel 718; Very high cycle fatigue; Residual stress; Life prediction

摘要：High and very high cycle fatigue behaviours are influenced not only by the machined surface quality but also by the inherent stress state of components. In the study, the influence of inherent residual stress state within a forged Inconel 718 turbine disc on high and very high cycle fatigue life was investigated through ultrasonic fatigue testing at 20 degrees C and 650 degrees C. At 20 degrees C, the exterior of the turbine disc exhibited approximately 190 MPa higher fatigue limit compared to the interior, attributed to inherent compressive residual stress partially offsetting the applied stress, thereby reducing the mean stress. However, this discrepancy in fatigue limit between the exterior and interior positions became negligible at 650 degrees C due to stress relaxation during high temperature. A modified Basquin model incorporating surface quality and inherent residual stress effects on fatigue life was proposed. This modified model accurately predicated fatigue life for specimens with varying inherent residual stress and surface conditions at 20 degrees C and 650 degrees C, with fatigue data falling into the range of life factors +/- 3, compared to the range of life factors +/- 30 in classical Basquin model.