High-Cycle Fatigue Behavior and Fatigue Strength Prediction of Differently Heat-Treated 35CrMo Steels
Mengqi Yang,
Chong Gao,
Jianchao Pang,
Shouxin Li,
Dejiang Hu,
Xiaowu Li,
Zhefeng Zhang
Affiliations
Mengqi Yang
Branch Company of Maintenance & Test, CSG Power Generation Co., Ltd., Guangzhou 511400, China
Chong Gao
Shi-Changxu Innovation Center for Advanced Materials, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
Jianchao Pang
Shi-Changxu Innovation Center for Advanced Materials, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
Shouxin Li
Shi-Changxu Innovation Center for Advanced Materials, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
Dejiang Hu
Branch Company of Maintenance & Test, CSG Power Generation Co., Ltd., Guangzhou 511400, China
Xiaowu Li
Key Laboratory for Anisotropy and Texture of Materials (Ministry of Education), Department of Material Physics and Chemistry, School of Materials Science and Engineering, Northeastern University, Shenyang 110819, China
Zhefeng Zhang
Shi-Changxu Innovation Center for Advanced Materials, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
In order to obtain the optimum fatigue performance, 35CrMo steel was processed by different heat treatment procedures. The microstructure, tensile properties, fatigue properties, and fatigue cracking mechanisms were compared and analyzed. The results show that fatigue strength and yield strength slowly increase at first and then rapidly decrease with the increase of tempering temperature, and both reach the maximum values at a tempering temperature of 200 °C. The yield strength affects the ratio of crack initiation site, fatigue strength coefficient, and fatigue strength exponent to a certain extent. Based on Basquin equation and fatigue crack initiation mechanism, a fatigue strength prediction method for 35CrMo steel was established.
