Effects of Stress Amplitude Ratio and Phase Angle on Short Fatigue Crack Behavior and Fracture Mode of EA4T Steel

2021 ◽  
Author(s):  
Zhen Liao ◽  
Bing Yang ◽  
Sheng Dai ◽  
Shoune Xiao ◽  
Guangwu Yang ◽  
...  
Keyword(s):  
Fatigue Crack ◽  
Phase Angle ◽  
Fracture Mode ◽  
Stress Amplitude ◽  
Amplitude Ratio ◽  
Short Fatigue Crack ◽  
Crack Behavior ◽  
Effects Of Stress

scholarly journals Influence of Tension-torsion Stress Amplitude Ratio on Short Fatigue Crack Behaviour of LZ50 Steel

2020 ◽  
Vol 56 (16) ◽  
pp. 33
Author(s):  
YANG Bing ◽  
DAI Sheng ◽  
LIAO Zhen ◽  
MENG Fei ◽  
XIAO Shoune ◽  
...  
Keyword(s):  
Fatigue Crack ◽  
Stress Amplitude ◽  
Amplitude Ratio ◽  
Short Fatigue Crack ◽  
Lz50 Steel

scholarly journals Short Fatigue Crack Behavior of LZ50 Axle Steel Under Rotating-Bending Cyclic Loading

2018 ◽  
Vol 50 (1) ◽  
pp. 193-202 ◽  
Author(s):  
B. Yang ◽  
S. Dai ◽  
Y. Y. Wu ◽  
Z. Liao ◽  
S. Liang ◽  
...  
Keyword(s):  
Fatigue Crack ◽  
Cyclic Loading ◽  
Short Fatigue Crack ◽  
Crack Behavior ◽  
Rotating Bending

scholarly journals Tracking hydrogen embrittlement using short fatigue crack behavior of metals

2018 ◽  
Vol 13 ◽  
pp. 1427-1432 ◽  
Author(s):  
Vishal Singh ◽  
Rajwinder Singh ◽  
Amanjot Singh ◽  
Dhiraj K. Mahajan
Keyword(s):  
Fatigue Crack ◽  
Hydrogen Embrittlement ◽  
Short Fatigue Crack ◽  
Crack Behavior

scholarly journals Effect of Periodic Overloads on Short Fatigue Crack Behavior in CuNi2Si Alloy under Rotating Bending Load

Metals ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 1267
Author(s):  
Yahang Qin ◽  
Bing Yang ◽  
Bo Feng ◽  
Yifan Li ◽  
Shoune Xiao ◽  
...  
Keyword(s):  
Fatigue Crack ◽  
Fatigue Life ◽  
Fatigue Cracks ◽  
Fatigue Crack Initiation ◽  
Constant Load ◽  
Multiple Cracks ◽  
Short Fatigue Crack ◽  
Crack Behavior ◽  
Bending Load ◽  
Rotating Bending

In this study, the short fatigue crack behavior in a precipitation-strengthened CuNi2Si alloy was investigated using a replica technique under rotating bending loads with periodic overloads, an overload ratio of 1.5, and the stress ratio of both was R = −1. The results show that all the fatigue cracks originated from the surface of the specimen and displayed a trend of slow initiation and then rapid propagation. The introduction of overloads significantly reduced the fatigue crack initiation time and the fatigue life of the sample. The average life of the overloaded samples was only 31% that of the constant load samples. For overload specimens, multiple cracks grew at the same time and merged at different stages, causing the crack length to increase instantaneously after they merged, thereby considerably reducing the fatigue life. Fractographical analysis and observation of the surface-etched sample replica film showed that cracks in samples with and without overload both propagated along the grain boundaries.

Sign in / Sign up

Export Citation Format

Share Document