Study of the effectiveness of protective coatings on alloy ZhS6U with thermal fatigue

1985 ◽  
Vol 17 (11) ◽  
pp. 1544-1549
Author(s):  
K. P. Buiskikh
Keyword(s):  
Thermal Fatigue ◽  
Protective Coatings ◽  
Alloy Zhs6u

scholarly journals Comparative study of protective coatings for heat resistance

2020 ◽  
Vol 23 (1) ◽  
pp. 41-48
Author(s):  
A. V. Zorichev ◽  
G. T. Pashchenko ◽  
O. A. Parfenovskaya ◽  
V. M. Samoylenko ◽  
T. I. Golovneva
Keyword(s):  
Phase Composition ◽  
Heat Resistance ◽  
Temperature Change ◽  
Thermal Fatigue ◽  
Protective Coatings ◽  
Fatigue Cracks ◽  
Turbine Blades ◽  
Cyclic Temperature ◽  
Thermal Fatigue Cracks ◽  
Cyclic Temperature Change

Modern gas turbine engines operate under changing temperature loads. Therefore, one of the important characteristics of the protective coatings used on the turbine blades is their high resistance to the occurrence and development of cracks under mechanical and thermal loads. The applied effective systems of internal heat removal of the cooled turbine blades lead to an increase in their heat stress. At present, cracks arising from thermal fatigue are one of the common defects of the protective coatings used on turbine blades. The heat resistance of coatings at high temperatures is determined by three factors: the shape of the part on which the coating is applied, the thickness of the coating and the phase composition of the surface layers or the maximum aluminum content in the coating. Therefore, when choosing a protective coating for these operating conditions, it is important to know the impact of these factors on the thermal stability of the coating. The paper presents a comparative study of various coatings on their resistance to crack formation under cyclic temperature change. The dependence of the heat resistance of the considered coatings on the method of their application and phase-structural state is established. Especially valuable is the established mechanism of formation and propagation of thermal fatigue cracks depending on the phase composition of the initial coating. It is shown that the durability of protective coatings with cyclic temperature change depends on the chemical composition of the coating and the method of its formation. The dependence of the formation of thermal fatigue cracks on the samples with the coatings under study on the number of cycles of temperature change is established.

Thermal Fatigue of Anticorrosive Coatings and Multilayer Coatings: A Performance Index Approach

2008 ◽  
Vol 595-598 ◽  
pp. 941-950 ◽  
Author(s):  
Pierre D'Ans ◽  
Céline Bondoux ◽  
Christophe Degrandcourt ◽  
Mohamed Bakrim ◽  
Jean Dille ◽  
...  
Keyword(s):  
Thermal Fatigue ◽  
Protective Coatings ◽  
Multilayer Coating ◽  
Multilayer Coatings ◽  
Thermal Gradients ◽  
Anticorrosive Coatings ◽  
Model Combining ◽  
Index Approach ◽  
System Geometry ◽  
Borided Steel

A strategy is proposed to cope with combined thermal fatigue and hot corrosion resistance affecting industrial coatings. It allows comparing different materials, coatings and geometries with respect to thermal cracking and then properly selecting protective coatings. It uses a thermo-mechanical model combining the heat transfer conditions, thermal and mechanical properties of the materials and the system geometry. The model is applied to two cases: (i) borided steel, with experimental support; (ii) multilayer coating made of a thermal barrier layer, aimed at reducing thermal gradients in the system, and a corrosion layer.

Thermal fatigue resistance of heat-resistant alloys with protective coatings

1980 ◽  
Vol 12 (4) ◽  
pp. 464-469
Author(s):  
S. Z. Bokshtein ◽  
N. G. Bychkov ◽  
R. A. Dul'nev ◽  
G. N. Zaitsev ◽  
�. Ya. Ol'shanskaya ◽  
...  
Keyword(s):  
Fatigue Resistance ◽  
Thermal Fatigue ◽  
Protective Coatings ◽  
Thermal Fatigue Resistance ◽  
Heat Resistant

Thermal fatigue strength of directionally solidified, casting nickel alloy ZhS6U

1977 ◽  
Vol 9 (10) ◽  
pp. 1181-1188
Author(s):  
T. A. Gordeeva ◽  
R. A. Dul'nev ◽  
T. V. Rybina ◽  
G. I. Sobolev ◽  
V. A. Chumakov ◽  
...  
Keyword(s):  
Fatigue Strength ◽  
Nickel Alloy ◽  
Thermal Fatigue ◽  
Directionally Solidified ◽  
Alloy Zhs6u ◽  
Thermal Fatigue Strength

Endurance of alloy ZhS6U with protective coatings under thermocyclic loading

1989 ◽  
Vol 21 (8) ◽  
pp. 1015-1020
Author(s):  
K. P. Buishikh ◽  
V. G. Barilo
Keyword(s):  
Protective Coatings ◽  
Alloy Zhs6u ◽  
Thermocyclic Loading

Thermal fatigue strength of alloy ZhS6U in a nonuniform thermal stress state

1984 ◽  
Vol 16 (1) ◽  
pp. 7-12
Author(s):  
G. N. Tret'yachenko ◽  
L. V. Kravchuk ◽  
K. P. Buiskikh
Keyword(s):  
Thermal Stress ◽  
Fatigue Strength ◽  
Stress State ◽  
Thermal Fatigue ◽  
Thermal Stress State ◽  
Alloy Zhs6u ◽  
Thermal Fatigue Strength
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