Thermal fatigue failure induced by delamination in thermal barrier coating

被引:55
作者
Zhou, YC [1 ]
Hashida, T
机构
[1] Tohoku Univ, Fracture Res Inst, Sendai, Miyagi 9808579, Japan
[2] Xiangtan Univ, Inst Fundamental Mech & Mat Engn, Xiangtan 411105, Peoples R China
关键词
thermal fatigue failure; delamination; thermal barrier coating;
D O I
10.1016/S0142-1123(01)00096-2
中图分类号
TH [机械、仪表工业];
学科分类号
0802 ;
摘要
The paper presents the experimental and theoretical investigation on the thermal fatigue failure induced by delamination in thermal barrier coating system. Laser heating method was used to simulate the operating state of TBC (thermal barrier coating) system. The non-destructive evaluation such as acoustic emission (AE) detect was used to study the evolution of TBC system damage. Micro-observation and AE detect both revealed that fatigue crack was in two forms: surface crack and interface delamination. It was found that interface delamination took place in the period of cooling or heating. Heating or cooling rate and temperature gradient had an important effect on interface delamination cracking propagation. A theoretical model on interface delamination cracking in TBC system at operating state is proposed. In the model, a membrane stress P and a bending moment M are designated the thermal loads of the thermal stress and temperature gradient in TBC system. In this case, the coupled effect of plastic deformation, creep of ceramic coating as well as thermal growth oxidation (TGO) and temperature gradient in TBC system was considered in the model. The thermal stress intensity factors (TSIFs) in non-FGM (functional gradient material) thermal barrier coating system is analytical obtained. The numerical results of TSIFs reveal some same results as obtained in experimental test. The model is based on fracture mechanics theory about heterogeneous materials and it gives a rigorous explanation of delaminations in TBC system loaded by thermal fatigue, Both theoretical analysis and experimental observation reveal an important fact: delaminations are fatigue cracks which grow during thermal shocks due to compressive stresses in the loading, this loads the delaminations cracks in mixed I and II mode. (C) 2002 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码:407 / 417
页数:11
相关论文
共 15 条
[1]   STUDY ON THE TURBINE VANE AND BLADE FOR A 1500-DEGREES-C CLASS INDUSTRIAL GAS-TURBINE [J].
AMAGASA, S ;
SHIMOMURA, K ;
KADOWAKI, M ;
TAKEISHI, K ;
KAWAI, H ;
AOKI, S ;
AOYAMA, K .
JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER-TRANSACTIONS OF THE ASME, 1994, 116 (03) :597-604
[2]   ANALYSIS OF CRACKED GAS-TURBINE BLADES [J].
BERNSTEIN, HL ;
ALLEN, JM .
JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER-TRANSACTIONS OF THE ASME, 1992, 114 (02) :293-301
[3]   Thermal/residual stress in an electron beam physical vapor deposited thermal barrier coating system [J].
Cheng, J ;
Jordan, EH ;
Barber, B ;
Gell, M .
ACTA MATERIALIA, 1998, 46 (16) :5839-5850
[4]   EDGE-BONDED DISSIMILAR ORTHOGONAL ELASTIC WEDGES UNDER NORMAL AND SHEAR LOADING [J].
DUNDURS, J ;
BOGY, DB .
JOURNAL OF APPLIED MECHANICS, 1969, 36 (03) :650-&
[5]   Effects of morphology on the decohesion of compressed thin films [J].
He, MY ;
Evans, AG ;
Hutchinson, JW .
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 1998, 245 (02) :168-181
[6]  
Mura T., 2012, Micromechanics of defects in solids, Springer Science
[7]   INTERFACE CRACK BETWEEN 2 ELASTIC LAYERS [J].
SUO, ZG ;
HUTCHINSON, JW .
INTERNATIONAL JOURNAL OF FRACTURE, 1990, 43 (01) :1-18
[8]   THERMAL FRACTURE OF MULTILAYER CERAMIC THERMAL BARRIER COATINGS [J].
TAKEUCHI, YR ;
KOKINI, K .
JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER-TRANSACTIONS OF THE ASME, 1994, 116 (01) :266-271
[9]   Determination of the growth stress and strain in α-Al2O3 scales during the oxidation of Fe-22Cr-4.8Al-0.3Y alloy [J].
Tolpygo, VK ;
Dryden, JR ;
Clarke, DR .
ACTA MATERIALIA, 1998, 46 (03) :927-937
[10]   Study of the performance of TBC under thermal cycling conditions using an acoustic emission rig [J].
Voyer, J ;
Gitzhofer, F ;
Boulos, MI .
JOURNAL OF THERMAL SPRAY TECHNOLOGY, 1998, 7 (02) :181-190