scholarly journals The Fatigue Crack Initiation Mechanism of the Annealed and the Surface-Rolled Low Carbon Steels

1970 ◽  
Vol 19 (204) ◽  
pp. 795-802
Author(s):  
Akira YOSHIDA ◽  
Hideaki KAWABE ◽  
Tomoharu YAMADA
Keyword(s):  
Fatigue Crack ◽  
Crack Initiation ◽  
Fatigue Crack Initiation ◽  
Carbon Steels ◽  
Low Carbon ◽  
Initiation Mechanism ◽  
Low Carbon Steels

Revealing the fatigue crack initiation mechanism of a TiB2-reinforced steel matrix composite

2020 ◽  
Vol 130 ◽  
pp. 105276 ◽  
Author(s):  
Ronghua Chen ◽  
Bochuan Li ◽  
Yizhuang Li ◽  
Zhicheng Liu ◽  
Xiangyun Long ◽  
...  
Keyword(s):  
Fatigue Crack ◽  
Crack Initiation ◽  
Matrix Composite ◽  
Fatigue Crack Initiation ◽  
Steel Matrix ◽  
Initiation Mechanism ◽  
Reinforced Steel ◽  
Steel Matrix Composite

Fatigue Crack Initiation Mechanism of Aluminium Alloy Welded Joint in Gigacycle Fatigue

2013 ◽  
Vol 376 ◽  
pp. 177-180
Author(s):  
Chao He ◽  
Shi Ming Cui ◽  
Yan Zeng Wu ◽  
Ze Fu Luo ◽  
Qing Yuan Wang
Keyword(s):  
Fatigue Crack ◽  
Crack Initiation ◽  
Aluminium Alloy ◽  
Fusion Zone ◽  
Base Metal ◽  
Welded Joint ◽  
Fatigue Crack Initiation ◽  
Fatigue Properties ◽  
Initiation Mechanism ◽  
Ultrasonic Fatigue

Ultrasonic fatigue test was performed on 5052 aluminium alloy welded joint to investigate the very high cycle fatigue properties and the fatigue crack initiation mechanisms with the help of microhardness tester and scanning electron microscope (SEM). The results showed that the hardness of fusion zone was higher that base metal and heat affected zone, which led to the embrittlement of welded zone. Fusion zone became the weakest part of welded joint under cyclical loading. Fatigue crack usually initiated from the pores beneath the surface from the SEM observation of fracture surface. The influence of pores on the fatigue crack initiation was analyzed to figure out the deterioration of fatigue strength for welded joint as compared with base metal.

Sign in / Sign up

Export Citation Format

Share Document