文献类型：期刊文献

英文题名：Low-cycle fatigue life prediction of a polycrystalline nickel-base superalloy using crystal plasticity modelling approach

作者：Yuan, Guang-Jian[1];Zhang, Xian-Cheng[1];Chen, Bo[2];Tu, Shan-Tung[1];Zhang, Cheng-Cheng[3]

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]Coventry Univ, Fac Engn, Inst Adv Mfg & Engn, Coventry CV6 5LZ, W Midlands, England;[3]AECC Commercial Aircraft Engine Co LTD, Shanghai Engn Res Ctr Commercial Aircraft Engine, Shanghai 201108, Peoples R China

年份：2020

卷号：38

起止页码：28

外文期刊名：JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY

收录：;EI(收录号：20194807739182);WOS:【SCI-EXPANDED(收录号:WOS:000503164100004)】；

基金：This work was supported financially by the National Natural Sciene Foundation of China (Nos. 51725503 and 51575183) and 111 Project. Zhang XC 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). Chen B acknowledges financial supports byCoventry University through the Early Career Researcher-Outgoing Mobility Award and by the East China University of Science and Technology through 111 Project to facilitate this international research collaboration.

语种：英文

外文关键词：Crystal plasticity; Fatigue; Finite element; Life prediction; Micro-mechanics; Nickel-base superalloy

摘要：A crystal plasticity model is developed to predict the cyclic plasticity during the low-cycle fatigue of GH4169 superalloy. Accumulated plastic slip and energy dissipation as fatigue indicator parameters (FIPs) are used to predict fatigue crack initiation and the fatigue life until failure. Results show that fatigue damage is most likely to initiate at triple points and grain boundaries where severe plastic slip and energy dissipation are present. The predicted fatigue life until failure is within the scatter band of factor 2 when compared with experimental data for the total strain amplitudes ranging from 0.8% to 2.4%. Microscopically, the adjacent grain arrangements and their interactions account for the stress concentration. In addition, different sets of grain orientations with the same total grain numbers of 150 were generated using the present model. Results show that different sets have significant influence on the distribution of stresses between each individual grain at the meso-scale, although little effect is found on the macroscopic length-scale. (C) 2019 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.