Secondary orientation effects on the low cycle fatigue behaviors of rectangular-sectional Ni-based single crystal superalloys at medium and high temperatures
Shao-Shi Rui
State Key Laboratory of Nonlinear Mechanics (LNM), Institute of Mechanics, Chinese Academy of Sciences, Beijing, China
Search for more papers by this authorZhiwu He
Anker Innovations Technology Co., Ltd., Shenzhen, Guangdong, China
Search for more papers by this authorYiyun Guo
State Key Laboratory of Nonlinear Mechanics (LNM), Institute of Mechanics, Chinese Academy of Sciences, Beijing, China
School of Engineering Science, University of Chinese Academy of Sciences, Beijing, China
Search for more papers by this authorYue Su
School of Power and Energy, Northwestern Polytechnical University, Xi'an, Shaanxi, China
Search for more papers by this authorQi-Nan Han
College of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, Jiangsu, China
Search for more papers by this authorCorresponding Author
Xianfeng Ma
Sino-French Institute of Nuclear Engineering and Technology, Sun Yat-Sen University, Zhuhai, Guangdong, China
Correspondence
Prof. Xianfeng Ma, Sino-French Institute of Nuclear Engineering and Technology, Sun Yat-Sen University, Zhuhai, Guangdong 519082, China.
Email: [email protected]
Prof. Hui-Ji Shi, Room N-513, Mong Man Wai Building of Science and Technology, Tsinghua University, Beijing 100084, China.
Email: [email protected]
Search for more papers by this authorCorresponding Author
Hui-Ji Shi
Applied Mechanics Laboratory (AML), School of Aerospace Engineering, Tsinghua University, Beijing, China
Correspondence
Prof. Xianfeng Ma, Sino-French Institute of Nuclear Engineering and Technology, Sun Yat-Sen University, Zhuhai, Guangdong 519082, China.
Email: [email protected]
Prof. Hui-Ji Shi, Room N-513, Mong Man Wai Building of Science and Technology, Tsinghua University, Beijing 100084, China.
Email: [email protected]
Search for more papers by this authorShao-Shi Rui
State Key Laboratory of Nonlinear Mechanics (LNM), Institute of Mechanics, Chinese Academy of Sciences, Beijing, China
Search for more papers by this authorZhiwu He
Anker Innovations Technology Co., Ltd., Shenzhen, Guangdong, China
Search for more papers by this authorYiyun Guo
State Key Laboratory of Nonlinear Mechanics (LNM), Institute of Mechanics, Chinese Academy of Sciences, Beijing, China
School of Engineering Science, University of Chinese Academy of Sciences, Beijing, China
Search for more papers by this authorYue Su
School of Power and Energy, Northwestern Polytechnical University, Xi'an, Shaanxi, China
Search for more papers by this authorQi-Nan Han
College of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, Jiangsu, China
Search for more papers by this authorCorresponding Author
Xianfeng Ma
Sino-French Institute of Nuclear Engineering and Technology, Sun Yat-Sen University, Zhuhai, Guangdong, China
Correspondence
Prof. Xianfeng Ma, Sino-French Institute of Nuclear Engineering and Technology, Sun Yat-Sen University, Zhuhai, Guangdong 519082, China.
Email: [email protected]
Prof. Hui-Ji Shi, Room N-513, Mong Man Wai Building of Science and Technology, Tsinghua University, Beijing 100084, China.
Email: [email protected]
Search for more papers by this authorCorresponding Author
Hui-Ji Shi
Applied Mechanics Laboratory (AML), School of Aerospace Engineering, Tsinghua University, Beijing, China
Correspondence
Prof. Xianfeng Ma, Sino-French Institute of Nuclear Engineering and Technology, Sun Yat-Sen University, Zhuhai, Guangdong 519082, China.
Email: [email protected]
Prof. Hui-Ji Shi, Room N-513, Mong Man Wai Building of Science and Technology, Tsinghua University, Beijing 100084, China.
Email: [email protected]
Search for more papers by this authorAbstract
Turbine blades made of Ni-based single crystal superalloys (NBSXs) have long-strip shaped cross sections and rectangular-sectional structures, where the secondary orientation produces potential effects even the primary orientation is fixed at [001]. Low cycle fatigue behaviors between [010] and [110] transversely oriented rectangular-sectional NBSX specimens were compared. Obvious differences existed under 600°C but disappeared under 850°C, with the deformation mechanism and fracture mode transitions. Secondary orientation effects on stress asymmetry and fatigue life cannot be described by the conventional LCP model and critical plane method but were well explained by dislocation path length-dependent back-stress model and A.N. May's random slip model.
Highlights
- Secondary orientation effects on rectangular-sectional NBSXs under 600°C are more obvious than those under 850°C;
- [110] case shows higher stress asymmetry and longer fatigue life than [010] case under 600°C;
- The secondary orientation effect on stress asymmetry is attributed to the different dislocations paths;
- The secondary orientation effect on fatigue life is attributed to the different dislocations intrusions' depths.
Open Research
DATA AVAILABILITY STATEMENT
The experimental data required to reproduce findings of this study cannot be shared online at this moment due to the time limitations, but are available from the corresponding authors upon request.
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