Creep rupture mechanism and microstructure evolution around film-cooling holes in nickel-based single crystal superalloy specimen

2020 ◽  
Vol 235 ◽  
pp. 107187
Author(s):  
Dongxu Zhang ◽  
Jinyang He ◽  
Jianwei Liang
Keyword(s):  
Single Crystal ◽  
Microstructure Evolution ◽  
Film Cooling ◽  
Creep Rupture ◽  
Single Crystal Superalloy ◽  
Film Cooling Holes ◽  
Rupture Mechanism

Creep-fatigue rupture mechanism and microstructure evolution around film-cooling holes in nickel-based DS superalloy specimen

2021 ◽  
Vol 139 ◽  
pp. 107359
Author(s):  
Ting Zhao ◽  
Xiaoan Hu ◽  
Yun Jiang ◽  
Xuefeng Teng ◽  
Fencheng Liu ◽  
...  
Keyword(s):  
Microstructure Evolution ◽  
Film Cooling ◽  
Creep Fatigue ◽  
Fatigue Rupture ◽  
Film Cooling Holes ◽  
Rupture Mechanism

Prediction of creep rupture life of a V-notched bar in DD6 Ni-based single crystal superalloy

2014 ◽  
Vol 615 ◽  
pp. 14-21 ◽  
Author(s):  
D.S. Liu ◽  
D.X. Zhang ◽  
J.W. Liang ◽  
Z.X. Wen ◽  
Z.F. Yue
Keyword(s):  
Single Crystal ◽  
Rupture Life ◽  
Creep Rupture ◽  
Single Crystal Superalloy

Microstructure Evolution of a Single Crystal Superalloy after Tensile Fracture at Different Temperature

2013 ◽  
Vol 721 ◽  
pp. 262-265
Author(s):  
Zhen Xue Shi ◽  
Shi Zhong Liu ◽  
J. Yu ◽  
M. Han ◽  
J.R. Li
Keyword(s):  
Single Crystal ◽  
Microstructure Evolution ◽  
Stacking Faults ◽  
Single Crystal Superalloy ◽  
Tensile Fracture ◽  
Matrix Channel ◽  
Stress Orientation ◽  
Transmission Electron ◽  
Strength Behavior ◽  
The Matrix

The tensile property tests of DD6 single crystal superalloy were performed at 25°C, 760°C and 980°C in air. Detailed microstructure evolution was carried out on the alloy to illuminate the γ phase and dislocation structure after tensile fracture by scanning electron microscope and transmission electron microscopy. The results show that the alloy has the maximum tensile strength and the minimum plasticity at 760°C. DD6 alloy has the same anomalous yield strength behavior with other single crystal superalloys. The γ phase hasve a little extension in the stress orientation after tensile fracture at 25°C. The γ phase morphology still maintains cubic after tensile fracture at 760°C. The γ phase is no longer cubic and changes into rectangular solid in the specimen tensile ruptured at 980°C. The vertical γ matrix becomes thinner and horizontal γ matrix becomes thicker slightly. The γ phase is no longer cubic and changes into rectangular solid. High density dislocations are present in the matrix channels and a lot of superlattice stacking faults are seen within γ phases in the sample tested at 25°C. A large quantities of superlattice stacking faults within γ phase and a lot of dislocations tangling in matrix channel are all present in the sample tested at 760°C. The dislocation networks have homogeneously formed at γ/γ interface in the sample tested at 980°C.

scholarly journals Creep-rupture behavior of a nickel-based single crystal superalloy

2019 ◽  
Vol 605 ◽  
pp. 012021
Author(s):  
Weiwei Liu ◽  
Yuanyuan Guo ◽  
Mai Zhang ◽  
Jichun Xiong ◽  
Jian Zhang
Keyword(s):  
Single Crystal ◽  
Creep Rupture ◽  
Single Crystal Superalloy ◽  
Rupture Behavior
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