High Temperature Fatigue Properties Research of GH4169 under Multiaxial Cyclic Loading

2017 International Symposium on Application of Materials Science and Energy Materials

材料科学;能源学

Ma, Shaojun^1 ; Tong, Dihua^1 ; Li, Liyun^2 ; Cheng, Yangyang^2 ; Hu, Benrun^1 ; Chen, Bo^1

AECC Beijing Institute of Aeronautical Materials, Beijing

100095, China^1

China University of Mining and Technology, Beijing

100086, China^2

关键词: Cyclic hardening behavior;    Cyclic softening;    Fatigue properties;    High temperature;    High temperature fatigue properties;    Multiaxial cyclic loading;    Strain-controlled;    Uniaxial tensions;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/322/2/022039/pdf
DOI  :  10.1088/1757-899X/322/2/022039

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

The high temperature (550°C and 650°C) fatigue properties of GH4169 for thin-wall tube specimen are investigated under uniaxial tension, uniaxial torsion, proportional tension-torsion and nonproportional tension-torsion. All tests are strain-controlled. The results indicate that the shape of the hysteresis loops of uniaxial tension, uniaxial torsion and proportional tension-torsion are similar, but hysteresis loop of non-proportional tension-torsion has distortion; the cyclic softening behavior is shown for GH4169 under uniaxial tension, uniaxial torsion and proportional tension-torsion, but the cyclic hardening behavior is shown for the first several cycles of nonproportional tension-torsion.