Influence of temperature, protective coatings, and accrued service life on the fatigue resistance of gas turbine blades of cast �p539LM high-temperature strength alloy

1986 ◽  
Vol 18 (11) ◽  
pp. 1486-1491
Author(s):  
V. I. Romanov ◽  
B. A. Gryaznov ◽  
A. A. Rabinovich ◽  
O. G. Zhiritskii ◽  
I. S. Malashenko ◽  
...  
Keyword(s):  
High Temperature ◽  
Service Life ◽  
Gas Turbine ◽  
Fatigue Resistance ◽  
Protective Coatings ◽  
Turbine Blades ◽  
High Temperature Strength ◽  
Influence Of Temperature ◽  
Gas Turbine Blades ◽  
Strength Alloy

UDIMET L-605

Alloy Digest ◽  
2004 ◽  
Vol 53 (12) ◽  
Keyword(s):  
Corrosion Resistance ◽  
High Temperature ◽  
Physical Properties ◽  
Tensile Properties ◽  
Gas Turbine ◽  
Oxidation Resistance ◽  
Turbine Blades ◽  
Heat Treating ◽  
Gas Turbine Blades ◽  
Temperature Performance

Abstract Udimet L-605 is a high-temperature aerospace alloy with excellent strength and oxidation resistance. It is used in applications such as gas turbine blades and combustion area parts. This datasheet provides information on composition, physical properties, and tensile properties as well as creep. It also includes information on high temperature performance and corrosion resistance as well as forming, heat treating, and joining. Filing Code: CO-109. Producer or source: Special Metals Corporation.

Heat resistance of gas turbine blades with protective coatings

1986 ◽  
Vol 18 (5) ◽  
pp. 610-615 ◽  
Author(s):  
A. P. Voloshchenko ◽  
G. N. Tret'yachenko ◽  
L. B. Getsov ◽  
B. M. Zinchenko ◽  
I. S. Malashenko ◽  
...  
Keyword(s):  
Heat Resistance ◽  
Gas Turbine ◽  
Protective Coatings ◽  
Turbine Blades ◽  
Gas Turbine Blades

An X-ray study of residual macrostresses in protective coatings for gas-turbine blades

1997 ◽  
Vol 39 (11) ◽  
pp. 484-488
Author(s):  
Yu. D. Yagodkin ◽  
K. M. Pastukhov ◽  
E. V. Milyaeva ◽  
S. A. Muboyadzhyan ◽  
S. A. Budinovskii
Keyword(s):  
Gas Turbine ◽  
Protective Coatings ◽  
Turbine Blades ◽  
X Ray ◽  
Gas Turbine Blades ◽  
Residual Macrostresses

High Temperature Degradation of Coating and Substrate in Gas Turbine Blade

1995 ◽  
Author(s):  
Y. Sugita ◽  
M. Ito ◽  
N. Isobe ◽  
S. Sakurai ◽  
C. R. Gold ◽  
...  
Keyword(s):  
High Temperature ◽  
Gas Turbine ◽  
Cross Sections ◽  
Turbine Blades ◽  
Temperature Oxidation ◽  
Gas Turbine Blades ◽  
Coating Surface ◽  
Ductile Brittle Transition Temperature ◽  
Scanning Auger Microprobe ◽  
Long Time

This paper studied high temperature degradation behavior of gas turbine blades consisting of CoNiCrAlY coatings and Rene 80 substrates using a small punch (SP) testing technique at 295–1223 K and scanning Auger microprobe (SAM). In SP tests, coating cracks continuously propagated along the radial direction at 295 K and many cracks discretely were formed along more random directions at higher temperatures. The ductility of the coating at 295 K was reduced and the ductile-brittle transition temperature was increased during long time exposure of gas turbine blades to high temperature oxidation environments. SAM analyses on cross sections and fracture surfaces of the coatings indicated that oxidation and S segregation near the coating surface are profoundly induced in-service. The relationship between the mechanical properties and microstructural/chemical evolution near the coating surface is presented which serves as a data base for determining the remaining life of gas turbine blades.

scholarly journals Investigation of the Relationship between Degradation of the Coating of Gas Turbine Blades and Its Surface Color

Materials ◽  
2021 ◽  
Vol 14 (24) ◽  
pp. 7843
Author(s):  
Mariusz Bogdan ◽  
Józef Błachnio ◽  
Artur Kułaszka ◽  
Dariusz Zasada
Keyword(s):  
Gas Turbine ◽  
Gas Turbines ◽  
Protective Coatings ◽  
Turbine Blades ◽  
Operating Time ◽  
Surface Color ◽  
Metallographic Examination ◽  
Gas Turbine Blades ◽  
Study Results ◽  
The Relationship

This article presents issues concerning the relationship between the degradation of the coating of gas turbine blades and changes in the color of its surface. Conclusions were preceded by the determination of parameters characterizing changes in the technical condition of protective coatings made based on a metallographic examination that defined the morphological modifications of the microstructure of the coating, chemical composition of oxides, and roughness parameters. It has been shown that an increased operating time causes parameters that characterize the condition of the blades to deteriorate significantly. Results of material tests were compared with those of blade surface color analyses performed using a videoscope. Image data were represented in two color models, i.e., RGB and L*a*b* with significant differences being observed between parameters in both representations. The study results demonstrated a relationship between the coating degradation degree and changes in the color of the blade’s surface. Among others, this approach may be used as a tool to assess the condition of turbine blades as well as entire gas turbines.

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