High cycle fatigue and fracture behaviors of CrMoV/NiCrMoV dissimilar rotor welded joint at 280 °C

2020 ◽  
Vol 786 ◽  
pp. 139473
Author(s):  
Wen-Ke Wang ◽  
Yan Liu ◽  
Yang Guo ◽  
Zhen-Zhen Xu ◽  
Jie Zhong ◽  
...  
Keyword(s):  
High Cycle Fatigue ◽  
Welded Joint ◽  
Cycle Fatigue ◽  
Fracture Behaviors ◽  
Fatigue And Fracture

Microstructural effects on the high-cycle fatigue and fracture behaviors of Ti-6Al-4V alloy

2020 ◽  
Vol 235 ◽  
pp. 107129
Author(s):  
Zhihong Wu ◽  
Hongchao Kou ◽  
Luyao Tang ◽  
Wei Chen ◽  
Xiaoning Han ◽  
...  
Keyword(s):  
High Cycle Fatigue ◽  
Cycle Fatigue ◽  
Microstructural Effects ◽  
Fracture Behaviors ◽  
Fatigue And Fracture

High cycle fatigue and fracture behavior of Ti-5Al-5Mo-5V-3Cr alloy with BASCA and double aging treatments

2016 ◽  
Vol 658 ◽  
pp. 203-209 ◽  
Author(s):  
Leonardo Contri Campanelli ◽  
Paulo Sergio Carvalho Pereira da Silva ◽  
Claudemiro Bolfarini
Keyword(s):  
Fracture Behavior ◽  
High Cycle Fatigue ◽  
Cycle Fatigue ◽  
Double Aging ◽  
Fatigue And Fracture

scholarly journals Very High Cycle Fatigue Crack Initiation Mechanism in Nugget Zone of AA 7075 Friction Stir Welded Joint

2017 ◽  
Vol 2017 ◽  
pp. 1-10 ◽  
Author(s):  
Chao He ◽  
Kazuhiro Kitamura ◽  
Kun Yang ◽  
Yong-jie Liu ◽  
Qing-yuan Wang ◽  
...  
Keyword(s):  
Crack Initiation ◽  
High Cycle Fatigue ◽  
Welded Joint ◽  
Cycle Fatigue ◽  
Nugget Zone ◽  
Initiation Mechanism ◽  
Friction Stir ◽  
Very High Cycle Fatigue ◽  
Aa 7075 ◽  
Very High

Very high cycle fatigue behavior of nugget zone in AA 7075 friction stir welded joint was experimentally investigated using ultrasonic fatigue testing system (20 kHz) to clarify the crack initiation mechanism. It was found that the fatigue strength of nugget zone decreased continuously even beyond 107 cycles with no traditional fatigue limits. Fatigue cracks initiated from the welding defects located at the bottom side of the friction stir weld. Moreover, a special semicircular zone could be characterized around the crack initiation site, of which the stress intensity factor approximately equaled the threshold of fatigue crack propagation rate. Finally, a simplified model was proposed to estimate the fatigue life by correlating the welding defect size and applied stress. The predicted results are in good agreement with the experimental results.

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