scholarly journals Superimposed Effect of High Cycle Fatigue and Low Cycle Fatigue Loadings on Small Crack Propagation Around Cooling Hole in A Directionally Solidified Ni-base Superalloy

2019 ◽  
Vol 68 (2) ◽  
pp. 129-135
Author(s):  
Yuki YONAKUNI ◽  
Shin YOSHIZAKI ◽  
Masakazu OKAZAKI
Keyword(s):  
Crack Propagation ◽  
High Cycle Fatigue ◽  
Low Cycle Fatigue ◽  
Small Crack ◽  
Cycle Fatigue ◽  
Directionally Solidified ◽  
Cooling Hole ◽  
Base Superalloy ◽  
Superimposed Effect

Low cycle fatigue behavior of a directionally solidified cobalt base superalloy

1999 ◽  
Vol 270 (2) ◽  
pp. 162-169 ◽  
Author(s):  
Zheng Lu ◽  
Yongbo Xu ◽  
Zhuangqi Hu
Keyword(s):  
Low Cycle Fatigue ◽  
Fatigue Behavior ◽  
Cycle Fatigue ◽  
Directionally Solidified ◽  
Cobalt Base ◽  
Base Superalloy

ICOPE-15-C035 Crack Propagation Life under Low Cycle Fatigue and High Cycle Fatigue of Nuclear Steam Turbine Rotors

2015 ◽  
Vol 2015.12 (0) ◽  
pp. _ICOPE-15--_ICOPE-15-
Author(s):  
Jin-yuan SHI ◽  
Yong WANG ◽  
Wang-fan LI ◽  
Zhi-cheng DENG ◽  
Yu Yang
Keyword(s):  
Crack Propagation ◽  
Steam Turbine ◽  
High Cycle Fatigue ◽  
Low Cycle Fatigue ◽  
Cycle Fatigue ◽  
Turbine Rotors

Small crack propagation during low cycle fatigue tests at elevated temperature

1998 ◽  
pp. 523-528
Author(s):  
Thomas Hansson ◽  
Torsten Koch ◽  
Peter Georgsson ◽  
Jan Börjesson
Keyword(s):  
Elevated Temperature ◽  
Crack Propagation ◽  
Low Cycle Fatigue ◽  
Fatigue Tests ◽  
Small Crack ◽  
Cycle Fatigue

Temperature effect on the low cycle fatigue behavior of a directionally solidified nickel-base superalloy

2016 ◽  
Vol 676 ◽  
pp. 246-252 ◽  
Author(s):  
Zhiwu He ◽  
Yangyang Zhang ◽  
Wenhui Qiu ◽  
Hui-Ji Shi ◽  
Jialin Gu
Keyword(s):  
Temperature Effect ◽  
Low Cycle Fatigue ◽  
Fatigue Behavior ◽  
Nickel Base Superalloy ◽  
Cycle Fatigue ◽  
Directionally Solidified ◽  
Nickel Base ◽  
Base Superalloy

LCF Initiated - HCF Propagated Crack Life Estimation of Gas Turbine Bolts

2018 ◽  
Author(s):  
Amit K. Paspulati ◽  
Krishna Veluru ◽  
Kashinath Akki ◽  
Rohit Khattar ◽  
Sudeep Bosu ◽  
...  
Keyword(s):  
Crack Propagation ◽  
Gas Turbine ◽  
High Cycle Fatigue ◽  
Low Cycle Fatigue ◽  
Evaluation Studies ◽  
Three Dimensional ◽  
Fatigue Loading ◽  
Turbine Rotor ◽  
Cycle Fatigue ◽  
Compressor Rotor

This paper discusses the methodology to calculate high cycle fatigue (HCF) crack propagation life of gas turbine bolts and compares two dimensional (2D) HCF crack propagation life to three dimensional (3D) HCF crack propagation life. Gas turbine bolts when exposed to fatigue loading are prone to crack initiation and propagation (structural failure) during operation. In such cases cracks mostly are initiated by low cycle fatigue (LCF) and propagated by HCF. Therefore in current illustration the authors have evaluated crack propagation primarily initiated by low cycle fatigue and propagated by high cycle fatigue. 2D and 3D fracture methodology approaches had been used for analytical evaluation. The authors conclude on the efficacy of both the methods based on the data from the field. The coupling joint bolts located in the engine mid-section, which are used to join compressor rotor with turbine rotor are being considered for crack evaluation studies. The coupling bolts located in mid-section are primarily loaded by high axial bolt pre-loads needed to keep the joint intact, as well as loaded in bending due to rotor gravity sag. The crack propagation life is evaluated and validated with field data using cracked bolt specimen from the field.

High temperature low cycle fatigue behavior of a directionally solidified Ni-base superalloy DZ951

2008 ◽  
Vol 488 (1-2) ◽  
pp. 389-397 ◽  
Author(s):  
Zhaokuang Chu ◽  
Yu Jinjiang ◽  
Sun Xiaofeng ◽  
Guan Hengrong ◽  
Hu Zhuangqi
Keyword(s):  
High Temperature ◽  
Low Cycle Fatigue ◽  
Fatigue Behavior ◽  
Cycle Fatigue ◽  
Directionally Solidified ◽  
Base Superalloy
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