scholarly journals Investigation of Elastic Properties of the Single-Crystal Nickel-Base Superalloy CMSX-4 in the Temperature Interval between Room Temperature and 1300 °C

Crystals ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 152
Author(s):  
Alexander Epishin ◽  
Bernard Fedelich ◽  
Monika Finn ◽  
Georgia Künecke ◽  
Birgit Rehmer ◽  
...  
Keyword(s):  
Single Crystal ◽  
Elastic Properties ◽  
Temperature Interval ◽  
Elastic Constants ◽  
Gas Turbines ◽  
Room Temperature ◽  
Nickel Base Superalloy ◽  
Resonance Frequencies ◽  
Nickel Base ◽  
Base Superalloy

The elastic properties of the single-crystal nickel-base superalloy CMSX-4 used as a blade material in gas turbines were investigated by the sonic resonance method in the temperature interval between room temperature and 1300 °C. Elastic constants at such high temperatures are needed to model the mechanical behavior of blade material during manufacturing (hot isostatic pressing) as well as during technical accidents which may happen in service (overheating). High reliability of the results was achieved using specimens of different crystallographic orientations, exciting various vibration modes as well as precise measurement of the material density and thermal expansion required for modeling the resonance frequencies by finite element method. Combining the results measured in this work and literature data the elastic constants of the γ- and γ′-phases were predicted. This prediction was supported by measurement of the temperature dependence of the γ′-fraction. All data obtained in this work are given in numerical or analytical forms and can be easily used for different scientific and engineering calculations.

Dependence of Intergranular Fracture on Boundary Topography and Cohesion

1973 ◽  
Vol 31 ◽  
pp. 150-151
Author(s):  
J. E. Doherty ◽  
A. F. Giamei ◽  
B. H. Kear ◽  
C. W. Steinke
Keyword(s):  
Grain Boundary ◽  
Room Temperature ◽  
Nickel Base Superalloy ◽  
Boundary Shear ◽  
Room Temperature Ductility ◽  
Solid Solution Matrix ◽  
Nickel Base ◽  
Solution Matrix ◽  
Different Levels ◽  
Base Superalloy

Recently we have been investigating a class of nickel-base superalloys which possess substantial room temperature ductility. This improvement in ductility is directly related to improvements in grain boundary strength due to increased boundary cohesion through control of detrimental impurities and improved boundary shear strength by controlled grain boundary micros true tures.For these investigations an experimental nickel-base superalloy was doped with different levels of sulphur impurity. The micros tructure after a heat treatment of 1360°C for 2 hr, 1200°C for 16 hr consists of coherent precipitates of γ’ Ni3(Al,X) in a nickel solid solution matrix.

Microstructural evolution of a single crystal nickel-base superalloy during thermal exposure

2003 ◽  
Vol 57 (29) ◽  
pp. 4540-4546 ◽  
Author(s):  
L.R. Liu ◽  
T. Jin ◽  
N.R. Zhao ◽  
Z.H. Wang ◽  
X.F. Sun ◽  
...  
Keyword(s):  
Single Crystal ◽  
Microstructural Evolution ◽  
Thermal Exposure ◽  
Nickel Base Superalloy ◽  
Nickel Base ◽  
Base Superalloy
Sign in / Sign up

Export Citation Format

Share Document