Isothermal and thermomechanical fatigue behavior of Inconel 718 superalloy

被引：56
作者：
Deng, Wenkai [1 ,2 ]
Xu, Jinghao [1 ,2 ]
Hu, Yunming [3 ]
Huang, Zaiwang [1 ,2 ]
Jiang, Liang [1 ,2 ]
机构：
[1] Cent S Univ, State Key Lab Powder Met, Changsha 410083, Hunan, Peoples R China
[2] Cent S Univ, Powder Met Res Inst, Changsha 410083, Hunan, Peoples R China
[3] MTS Syst Corp, 14000 Technol Dr, Eden Prairie, MN 55344 USA
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2019年 / 742卷
基金：
中国国家自然科学基金;
关键词：
Inconel; 718; superalloy; Low cycle fatigue; Thermomechanical fatigue; Failure mechanism; Life prediction; LOW-CYCLE FATIGUE; COFFIN-MANSON RELATIONSHIP; THERMAL-MECHANICAL FATIGUE; SINGLE-CRYSTAL SUPERALLOY; CRACK-GROWTH-BEHAVIOR; BASE SUPERALLOY; DAMAGE MECHANISMS; DEFORMATION TWINS; MICROSTRUCTURE; ENVIRONMENT;
D O I：
10.1016/j.msea.2018.11.052
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The fatigue behavior and damage mechanisms of Inconel 718 are investigated and discussed under thermomechanical fatigue (TMF) and isothermal fatigue (IF) test conditions. The experimental results show that cyclic temperature accelerates fatigue degradation compared to isothermal equivalents, and the fatigue life under inphase (IP) TMF mode is shorter than that under out-of-phase (OP) mode. The S-N data can be fitted by Coffin-Manson equation under LCF condition, and TMF lifetime can be predicted by the model based on hysteresis loop energy with a comprehensive consideration of mechanical and thermal strains.
引用
收藏
页码：813 / 819
页数：7
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