scholarly journals Influence of Strength Level of Steels on Fatigue Strength and Fatigue Fracture Mechanism of Spot Welded Joints

2006 ◽  
Vol 55 (12) ◽  
pp. 1095-1101 ◽  
Author(s):  
Keiichiro TOHGO ◽  
Ryo ADOMI ◽  
Hiroyasu ARAKI ◽  
Kazuhiro SYOKO ◽  
Hidetaka TANAKA ◽  
...  
Keyword(s):  
Fatigue Strength ◽  
Fatigue Fracture ◽  
Welded Joints ◽  
Fracture Mechanism ◽  
Strength Level ◽  
Spot Welded ◽  
Fatigue Fracture Mechanism

scholarly journals Influence of Strength Level of Steels on Fatigue Strength and Fatigue Fracture Mechanism of Spot Weld-Bonded Joints

2013 ◽  
Vol 62 (12) ◽  
pp. 770-777 ◽  
Author(s):  
Tomoyuki FUJII ◽  
Keiichiro TOHGO ◽  
Takahiro YAMAMOTO ◽  
Yukinori SUZUKI ◽  
Yoshinobu SHIMAMURA ◽  
...  
Keyword(s):  
Fatigue Strength ◽  
Fatigue Fracture ◽  
Fracture Mechanism ◽  
Spot Weld ◽  
Strength Level ◽  
Bonded Joints ◽  
Fatigue Fracture Mechanism

Fatigue strength and fatigue fracture mechanism of three-sheet spot weld-bonded joints under tensile–shear loading

2016 ◽  
Vol 87 ◽  
pp. 424-434 ◽  
Author(s):  
Tomoyuki Fujii ◽  
Keiichiro Tohgo ◽  
Yukinori Suzuki ◽  
Takahiro Yamamoto ◽  
Yoshinobu Shimamura
Keyword(s):  
Fatigue Strength ◽  
Fatigue Fracture ◽  
Fracture Mechanism ◽  
Shear Loading ◽  
Spot Weld ◽  
Bonded Joints ◽  
Tensile Shear ◽  
Fatigue Fracture Mechanism

510 Fatigue Strength and Fracture Mechanism on Spot Welded Joints of Ultra-High Strength Steel

2006 ◽  
Vol 2006.55 (0) ◽  
pp. 209-210
Author(s):  
Ryo ADOMI ◽  
Makoto OHSUKA ◽  
Keiichiro TOHGO ◽  
Hiroyasu ARAKI ◽  
Yoshinobu SHIMAMURA ◽  
...  
Keyword(s):  
Fatigue Strength ◽  
Welded Joints ◽  
Fracture Mechanism ◽  
High Strength Steel ◽  
High Strength ◽  
Ultra High Strength Steel ◽  
Spot Welded

scholarly journals Fatigue Fracture Mechanism of a Nickel-Based Single Crystal Superalloy with Partially Recrystallized Grains at 550 °C by In Situ SEM Studies

Metals ◽  
2020 ◽  
Vol 10 (8) ◽  
pp. 1007
Author(s):  
Hao Yang ◽  
Jishen Jiang ◽  
Zhuozheng Wang ◽  
Xianfeng Ma ◽  
Jiajun Tu ◽  
...  
Keyword(s):  
Single Crystal ◽  
Fatigue Fracture ◽  
Fracture Mechanism ◽  
Fatigue Cracks ◽  
Single Crystal Substrate ◽  
In Situ Observation ◽  
Slip Systems ◽  
Intergranular Cracking ◽  
Fatigue Fracture Mechanism

The fatigue fracture mechanism of a nickel-based single crystal (NBSC) superalloy with recrystallized grains was studied at 550 °C by in situ observation with a scanning electron microscope (SEM) for the first time. Multiple crack initiations associated with recrystallized grain boundaries and carbides were observed. By analysis of the slip traces and crack propagation planes, the operated slip systems were identified to be octahedral for both single crystal substrate and recrystallized grains. Distinct crystallographic fractures dominated, accompanied by recrystallized grain boundary associated crack initiations. This is different from the widely reported solely intergranular cracking at high temperature. Fatigue crack growth rate curves showed evident fluctuation, due to the interaction of fatigue cracks with local microstructures and the crack coalescence mechanism. Both the recrystallized grains and the competition between different slip systems were responsible for the deceleration and acceleration of fatigue microstructurally small crack behavior.

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