Thermomechanical and Thermal Gradient Mechanical Fatigue Lifetime of Thermal Barrier Coating Systems


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Detailed damage analyses of an Y2O3 stabilized ZrO2 top coat (TC)–MCrAlY bond coat (BC)–superalloy thermal barrier coating (TBC) system during thermomechanical fatigue (TMF) and thermal gradient mechanical fatigue (TGMF) tests had been performed in present work. During tests, the lifetime of TBCs was strongly dependent on the strain ranges, pre-oxidation time and the thermal gradient in TBCs. Cracks were initiated in the TGO layer, propagated along the TC/TGO or TGO/BC interface, forming the delamination cracks. When the delamination cracks connected with the segmentation cracks which were initiated and propagated in TC, the TBCs spalled. The failure mechanism and stress were analyzed, which were significantly helpful to establish the TMF/TGMF lifetime prediction model for the TBCs.



Edited by:

Prof. Yafang Han




Z. J. Zhou et al., "Thermomechanical and Thermal Gradient Mechanical Fatigue Lifetime of Thermal Barrier Coating Systems", Materials Science Forum, Vol. 898, pp. 1524-1531, 2017

Online since:

June 2017




* - Corresponding Author

[1] N.P. Padture, M. Gell, E.H. Jordan, Thermal barrier coatings for gas-turbine engine applications, Science. 296 (2002) 280-284.


[2] D. R Clarke, S. R Phillpot, Thermal barrier coating materials, Mater. Today. 8 (2005) 22-29.

[3] Z.B. Chen, Z.G. Wang, S.J. Zhu, Failure behavior of thermal barrier coatings on cylindrical superalloy tube under thermomechanical fatigue, Acta Metall. Sin. 26 (2013) 404-408.


[4] S. Pahlavanyali, A. Rayment, B. Roebuck, G. Drew, C. Rae, Thermo-mechanical fatigue testing of superalloys using miniature specimens, Int. J. Fatigue. 30 (2008) 397-403.


[5] E. Tzimas, H. Müllejans, S. D Peteves, J. Bressers, W. Stamm, Failure of thermal barrier coating systems under cyclic thermomechanical loading, Acta. Mater. 48 (2000) 4699-4707.


[6] E. Sun, T. Heffernan, R. Helmink, Stress rupture and fatigue in thin wall single crystal superalloys with cooling holes, Superalloys, 53(12), 351(2012).


[7] Z.B. Chen, Thermomechanical fatigue behavior of thermal barrier coating systems on superalloy, doctoral dissertation.

[8] R.W. Neu, H. Sehitoglu, Thermomechnical fatigue, oxidation, and creep: Part I. Damage mechanisms, Metall. Mater. Trans. A 20 (1989) 1755-1767.

[9] R.W. Neu, H. Sehitoglu, Thermomechnical fatigue, oxidation, and creep: Part II. Life prediction, Metall. Mater. Trans. A 20 (1989) 1769-1783.


[10] M. Jinnestrand, H. Brodin, Crack initiation and propagation in air plasma sprayed thermal barrier coatings, testing and mathematical modeling of low cycle fatigue behavior, Mat. Sci. Eng. A 379 (2004) 45-57.


[11] H. Brodin, S. Johansson, Influence on low cycle fatigue properties of bond coat oxidation for a thermal barrier coating, http: /www. gruppofrattura. it/ocs/index. php/ICF/ICF10/paper/view/ 4784/6791.

[12] S. Ahmadian, C. Thistle, E.H. Jordan, Experimental and finite element study of an air plasma sprayed thermal barrier coating under fixed cycle duration at various temperatures, J. Am. Ceram. Soc. 96 (2013) 3210-3217.


[13] E.P. Busso, L. Wright, H.E. Evans, L.N. McCartney, S.R.J. Saunders, S. Osgerby, J. Nunn, A physics-based life prediction methodology for thermal barrier coating systems, Acta. Mater. 55 (2007) 1491-1503.


[14] C.C. Zhou, The correlation of residual stress in TGO with interface failure of thermal barrier coatings, doctoral dissertation.

[15] H.L. Bernstein, A model for the oxide growth stress and its effect on the creep of metals, Metall. Mater. Trans. A 18 (1987) 975-986.

[16] K.W. Schlichting, N.P. Padture, E.H. Jordan, M. Gell, Failure modes in plasma-sprayed thermal barrier coatings, Mat. Sci. Eng. A 342 (2003) 120-130.


[17] D.R. Clarke, W. Pompe, Critical radius for interface separation of a compressive stressed film from a rough surface, Acta. Mater. 47 (1999) 1749-1756.