scholarly journals Influence of γ/γ’ Composite Microstructure on Crack Tip Deformation Behavior in Ni-Based Single Crystal Superalloy

2015 ◽  
Vol 64 (2) ◽  
pp. 120-127 ◽  
Author(s):  
Yasuhiro MUKAI ◽  
Hiroyuki KAGAWA ◽  
Motoki SAKAGUCHI ◽  
Masakazu OKAZAKI
Keyword(s):  
Single Crystal ◽  
Deformation Behavior ◽  
Crack Tip ◽  
Single Crystal Superalloy ◽  
Composite Microstructure

Finite Element Analysis on Crack Tip Deformation Behavior under Mode-II Loading in Single Crystal Superalloy

2015 ◽  
Vol 665 ◽  
pp. 281-284
Author(s):  
Yasuhiro Mukai ◽  
Hiroyuki Kagawa ◽  
Masakazu Okazaki
Keyword(s):  
Finite Element ◽  
Single Crystal ◽  
Deformation Behavior ◽  
Stress Condition ◽  
Crack Tip ◽  
Single Crystal Superalloy ◽  
Mode Ii ◽  
Element Analysis ◽  
Inclusion Theory ◽  
Mode Ii Loading

Crack tip deformation behavior of single crystal superalloy under mode-II shear stress condition was evaluated by crystal plasticity finite element method by applying Eshelby’s inclusion theory to express the relation between microscopic and macroscopic stress/strain character, and the influence of γ/γ’ microstructure and anomalous temperature dependence of yield strength in γ’ phase on crack tip deformation behavior was studied

scholarly journals Deformation behavior during thermo-mechanical fatigue of a nickel-based single crystal superalloy

2011 ◽  
Vol 10 ◽  
pp. 281-286 ◽  
Author(s):  
H.U. Hong ◽  
B.G. Choi ◽  
I.S. Kim ◽  
Y.S. Yoo ◽  
C.Y. Jo
Keyword(s):  
Single Crystal ◽  
Deformation Behavior ◽  
Single Crystal Superalloy ◽  
Mechanical Fatigue

Atomistic Simulation of Deformation Behavior at a Crack Tip in Magnesium Single Crystal

2011 ◽  
Vol 675-677 ◽  
pp. 949-951
Author(s):  
Li Ming Jiang ◽  
Ya Fang Guo
Keyword(s):  
Molecular Dynamics ◽  
Single Crystal ◽  
Deformation Behavior ◽  
Atomistic Simulation ◽  
Shear Banding ◽  
Crack Tip ◽  
Temperature Deformation ◽  
Dynamics Simulations ◽  
Main Deformation ◽  
Model Crack

The mechanisms of low-temperature deformation around a crack tip in a hexagonally closed-packed (hcp) magnesium single crystal have been studied by molecular dynamics simulations. In our simulation a {1010} < 12 10 > model I (opening model) crack is selected. The results indicate that slip on the basal plane is activated due to the shear stress at the crack tip. Thus shear banding caused by a successive slip of the basal planes is the main deformation way for this type of crack.

scholarly journals Cyclic viscoplastic deformation modeling of a nickel-based single crystal superalloy with [001] orientation

2018 ◽  
Vol 165 ◽  
pp. 19005 ◽  
Author(s):  
Rongqiao Wang ◽  
Bin Zhang ◽  
Dianyin Hu ◽  
Kanghe Jiang ◽  
Jianxing Mao ◽  
...  
Keyword(s):  
Constitutive Model ◽  
Single Crystal ◽  
Deformation Behavior ◽  
Turbine Blades ◽  
Hysteresis Loops ◽  
Back Stress ◽  
Thermomechanical Fatigue ◽  
Growth Direction ◽  
Single Crystal Superalloy ◽  
Viscoplastic Deformation

Accurate simulations of cyclic viscoplastic deformation behaviors of single crystal superalloys which are widely used for the manufacture of gas turbine blades are important for the effective design and safety assessment in practice. In this context, based on the in-phase thermomechanical fatigue (IP TMF) and out-of-phase thermomechanical fatigue (OP TMF) experiments of the nickel-based single crystal superalloy with [001] orientation, a modified constitutive model has been developed to describe the deformation behavior under thermomechanical loadings. The TMF experiment results indicate that stable hysteresis loops with remarkable ratcheting appear in both IP TMF and OP TMF. And it’s worth noticing that the ratcheting growth direction of IP TMF and OP TMF are opposite. By introducing a Schmid stress rate related term to the back stress evolution equation, the slip-based Walker’s constitutive model is modified in this study. And the simulation results of the deformation behavior reveal good agreement with the experiments under different IP TMF and OP TMF conditions.

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