Numerical simulation of directional solidification of single crystal turbine blade casting

2008 ◽  
Vol 21 (1-4) ◽  
pp. 308-312 ◽  
Author(s):  
D. Pan ◽  
Q. Y. Xu ◽  
J. Yu ◽  
B. C. Liu ◽  
J. R. Li ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Single Crystal ◽  
Directional Solidification ◽  
Turbine Blade ◽  
Single Crystal Turbine Blade ◽  
Blade Casting

Modeling of Unidirectional Growth in a Single Crystal Turbine Blade Casting

2006 ◽  
pp. 111-116
Author(s):  
Qing Yan Xu ◽  
Bai Cheng Liu ◽  
Zuo Jian Liang ◽  
Jia Rong Li ◽  
Shi Zhong Liu ◽  
...  
Keyword(s):  
Single Crystal ◽  
Turbine Blade ◽  
Single Crystal Turbine Blade ◽  
Blade Casting

Modeling of Unidirectional Growth in a Single Crystal Turbine Blade Casting

2006 ◽  
Vol 508 ◽  
pp. 111-116 ◽  
Author(s):  
Qing Yan Xu ◽  
Bai Cheng Liu ◽  
Zuo Jian Liang ◽  
Jia Rong Li ◽  
Shi Zhong Liu ◽  
...  
Keyword(s):  
Single Crystal ◽  
Directional Solidification ◽  
Turbine Blade ◽  
Defect Formation ◽  
Turbine Blades ◽  
Solidification Process ◽  
Nickel Base Superalloy ◽  
Transversal Section ◽  
Nickel Base ◽  
Blade Casting

Single crystal superalloy turbine blade are widely used in aero-engineering. However, there are often grain defects occurring during the fabrication of blade by casting. It is important to study the formation of microstructure related defects in turbine blades. Single crystal blade sample castings of a nickel-base superalloy were produced at different withdrawal rates by the directional solidification process and investment casting. There was a difference between the microstructure morphology at the top part of the turbine blade sample castings and the one at the bottom. Higher withdrawal rates led to more differences in the microstructure and a higher probability of crystallographic defect formation such as high angle boundaries at locations with an abrupt change of the transversal section area. To further investigate the formation of grain defects, a numerical simulation technique was used to predict the crystallographic defects occurring during directional solidification. The simulation results agreed with the experimental ones.

The Analysis of Contact Fatigue Behavior in Ni-Base Single Crystal Superalloy Turbine Blade Rabbet

2014 ◽  
Vol 633-634 ◽  
pp. 1104-1110
Author(s):  
Guo Cai Zhou ◽  
Hai Qing Pei
Keyword(s):  
Shear Stress ◽  
Single Crystal ◽  
Turbine Blade ◽  
Contact Area ◽  
Fatigue Behavior ◽  
Stress Gradient ◽  
Contact Fatigue ◽  
Tooth Contact ◽  
Rate Dependent ◽  
Single Crystal Turbine Blade

Based on the dislocation pile-up theory and the crystal plastic theory, a rate-dependent crystallographic plastic finite element method (FEM) was used to analyze the stress distribution in the contact zone of single crystal turbine blade rabbet. The FEM results show that the maximum stress and the maximum resolved shear stress location are in the upper edge of the first tooth contact area of the rabbet. The surface crack initiates in the edge and grows as the zigzag wave. The deflected angle of the plane defined by maximum resolved shear stress gradient direction and the upper edge of the first tooth contact area of the rabbet with respect to the Z axis is 35°. The fracture occurs along the {-1-11} plane. Fracture behavior of rabbet/groove modeling specimens made of nickel-based single crystal superalloys was studied by corresponding contact fatigue experiments. The initial place and developing direction of the fatigue crack observed from experiments are found to be in good agreement with the predicted results based FEM.

scholarly journals Development of advanced columnar and single crystal turbine blade.

1990 ◽  
Vol 29 (4) ◽  
pp. 259-261
Author(s):  
Y. Ohta ◽  
Y. Nakagawa ◽  
H. Honda ◽  
S. Ohama ◽  
A. Ohtomo
Keyword(s):  
Single Crystal ◽  
Turbine Blade ◽  
Single Crystal Turbine Blade

Modeling of grain selection during directional solidification of single crystal superalloy turbine blade castings

JOM ◽  
2010 ◽  
Vol 62 (5) ◽  
pp. 30-34 ◽  
Author(s):  
Dong Pan ◽  
Qingyan Xu ◽  
Baicheng Liu ◽  
Jiarong Li ◽  
Hailong Yuan ◽  
...  
Keyword(s):  
Single Crystal ◽  
Directional Solidification ◽  
Turbine Blade ◽  
Single Crystal Superalloy ◽  
Superalloy Turbine Blade
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