文献类型：期刊文献

英文题名：Effect of Stress Ratio on the Fatigue Crack Propagation Behavior of the Nickel-based GH4169 Alloy

作者：Ye, Shen[1];Gong, Jian-Guo[1];Zhang, Xian-Cheng[1];Tu, Shan-Tung[1];Zhang, Cheng-Cheng[2]

机构：[1]East China Univ Sci & Technol, Sch Mech & Power Engn, Minist Educ, Key Lab Pressure Syst & Safety, Meilong Rd 130, Shanghai 200237, Peoples R China;[2]AECC Commercial Aircraft Engine Co LTD, Shanghai Engn Res Ctr Commercial Aircraft Engine, Shanghai 201108, Peoples R China

年份：2017

卷号：30

期号：9

起止页码：809

外文期刊名：ACTA METALLURGICA SINICA-ENGLISH LETTERS

收录：;EI(收录号：20173504094785);WOS:【SCI-EXPANDED(收录号:WOS:000410943500001)】；

基金：The authors acknowledge gratefully for the financial support through the National Natural Science Foundations of China (Nos. 51371082 and 51322510) and 111 project. The author X.C. Zhang is also grateful for the support by Shanghai Pujiang Program, Young Scholar of the Yangtze River Scholars Program, and Shanghai Technology Innovation Program of SHEITC (No. CXY-2015-001).

语种：英文

外文关键词：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 micronotch 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.