Effect of Stress Ratio on the Fatigue Crack Propagation Behavior of the Nickel-based GH4169 Alloy

作     者：Shen Ye Jian-Guo Gong Xian-Cheng Zhang Shan-Tung Tu Cheng-Cheng Zhang 

作者机构：Key Laboratory of Pressure Systems and SafetyMinistry of EducationSchool of Mechanical and Power EngineeringEast China University of Science and TechnologyMeilongRoad 130Xuhui DistrictShanghai 200237People'sRepublic of China AECC Commercial Aircraft Engine Co.LTDShanghaiEngineering Research Center for Commercial Aircraft EngineShanghai 201108People's Republic of China 

出 版 物：《Acta Metallurgica Sinica(English Letters)》 (金属学报（英文版）)

年 卷 期：2017年第30卷第9期

页      面：809-821页

核心收录：

学科分类：0817[工学-化学工程与技术] 0806[工学-冶金工程] 08[工学] 0807[工学-动力工程及工程热物理] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0802[工学-机械工程] 0703[理学-化学] 0811[工学-控制科学与工程] 

基　　金：financial support through the National Natural Science Foundations of China(Nos.51371082 and 51322510) 111 project support by Shanghai Pujiang Program Young Scholar of the Yangtze River Scholars Program Shanghai Technology Innovation Program of SHEITC(No.CXY2015-001) 

主　　题：Fatigue crack Crack growth rate Stress ratio Nickel-based alloy 

摘      要：The fatigue crack growth behavior of the newly developed GH4169 nickel-based alloy at a maximum stress of 700 MPa and different stress ratios was investigated in the present work employing the specimens with a single micro- notch at a frequency of 129 Hz at room temperature. The results demonstrate a typical three-stage process of fatigue crack propagation processing from the microstructurally small crack （MSC） stage to the physically small crack （PSC） stage, and finally to the long crack stage. The crack growth rate in the MSC stage is relatively high, while the crack growth rate in the PSC stage is relatively low. A linear function of crack-tip reversible plastic zone size was proposed to predict the crack growth rate, indicating an adequate prediction solution.