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Thermal barrier coatings (TBCs) are widely used on Ni-based superalloy components of gas turbine engines. Although several mechanisms for the failure of the TBCs have been suggested, it is largely accepted that the durability of these coatings is primarily determined by the residual stresses that are introduced due to the growth of the TGO during operation. In the present study, the residual stress build-up in a TBC system during thermal cycling is modeled. A two-dimensional plane strain finite element analysis is carried out. The model includes both flat and undulated growth fronts for the TGO layer. The stress distribution pattern in the TBC system in the case of a planar TGO front was found to be markedly different from that of an undulated front. The ceramic layer was found to be prone to delamination at concave undulations.
Rocznik
Tom
Strony
869--883
Opis fizyczny
Bibliogr. 31 poz., tab., wykr.
Twórcy
autor
autor
autor
autor
- Defence Metallurgical Research Laboratory Kanchanbagh, Hyderabad 500 058, INDIA, srivathsab@dmrl.drdo.in
Bibliografia
- Alam Z., Srivathsa B., Kamat S.V. and Das D.K. (2010): Evolution of tensile properties of free standing Pt Aluminide and Pt Aluminide based coat at RT. - J. of Mat Sci. Engg. A, 3, pp.842-848.
- Bednarz P. (2007): Finite Element Simulation of stress evolution in Thermal Barrier Coating systems. - Ph.D Thesis, Forschungszentrum Jülich.
- Bhatnagar H., Ghosh S. and Walter M.E. (2006), Parametric studied of failure mechanisms in elastic EB-PVD thermal barrier coatings using FEM. - Intl. Jl. of Solids and Struc., vol.43, pp.4384-4406.
- Cheng J., Jordan E.H., Barber B. and Gell M. (1998): Thermal/Residual stress in an electron beam physical vapor deposited thermal barrier coating. - Acta Materilia, vol.46, No.16, pp.5839-5850.
- Chun-Hway, Hsnech and Edwin R. Fuller Jr (2000): Residual stresses in thermal barrier coatings: effects of interface asperity curvature/height and oxide thickness. - Material Science and Engineering A, vol.283, pp.46-55.
- Cruse T.A., Stewart S. and Ortiz M. (1987): Thermal barrier coatings life prediction model development. - J. Eng. Gas Turbines and Power, vol.110, No.4, pp.610-616.
- Czech N., Juez Lorenzo M. and Kolarik V. (1998): Influence of the surface roughness on the oxide scale formation on coatings studied in situ by high temperature x-ray diffraction. - Surface and Coatings Technology, vol.36, No.42, pp.108-109.
- Das D.K., Manish Roy, Singh V. and Joshi S.V. (1999): Microstructural degradation of plain and Pt-aluminide coatings on superalloy CM-247 during isothermal oxidation. - Materials Science and Technology, vol.15, pp.1199.
- Evans A.G., He M.Y. and Hutchinson J.W. (2001): Mechanics based scaling laws for the durability of TBCs. - Progress in Material Science, vol.46, pp.249-271.
- Evans A.G., Hutchinson J.W. and Wei Y. (1999): Interface adhesion: effects of plasticity and segregation. - Acta Mat., vol.47, No.15, pp.4093.
- Evans A.G., Mumm D.R., Hutchinson J.W., Meier G.H. and Pettit F.S. (2001): Mechanism controlling the durability of thermal barrier coatings. - Progress in Materials Sci., vol.46, pp.505-553.
- Farrell M.S., Boone D.H. and Streiff R. (1987): Oxide adhesion and growth characteristics on platinum modified aluminide coatings. - Surface and Coatings Technology, vol.32, pp.69-84.
- Fauchais P., Vardelle A. and Dussoubs B. (2001): Methods of thermal spraying. - J. of Thermal Spray Tech., vol.10, No.1, pp.44-66.
- Haynes J.A., Zhang Y., Lee W.Y., Pint B.A. and Wright I.G. (1999): editors, Elevated temperature coatings. - Science and Technology, TMS, 185.
- He M.Y., Evan A.G. and Hutchinson J.W. (2000): The ratcheting of compressed thermally grown oxide on ductile substrate. - Acta Mat., vol.48, pp.2593-2601.
- Hillery R. (1996): NRC report, Coatings for high temperature structural materials. - National Academy Press.
- Hsueh C.H. and Fuller E.R. (2000): Analytical modeling of oxide thickness effects on residual stresses in thermal barrier coatings. - Scripta Materialia, vol.42, pp.781-787.
- Johnson C., Rudd J. and Bruce D. (1998): Relationship between residual stress, microstructure and mechanical properties of EB-PVD thermal barrier coatings. - Surface and Coatings Technology, vol.108, pp.80-85.
- Karlsson A.M., Levi C.G. and Evan A.G. (2002): A model study for displacement instabilities during cyclic oxidation. - Acta Materilia, vol.50, pp.1263-1273.
- Karlsson A.M., Xu T. and Evans A. (2002): The effect of the thermal barrier coating on the displacement instability in thermal barrier systems. - Acta Materilia, vol.50, pp.1211-1218.
- Karlson A.M. and Evans A.G. (2001): A numerical model for the cyclic instability of thermally grown oxides in thermal barrier systems. - Acta Mater., vol.49, pp.1793-1804.
- Kokini K., Choules B.D. and Taylor T.A. (1998): Thermal fracture of thermal barrier coatings in a high flux environment. - Surface and Coatings Technology, vol.106, pp.23-29.
- Lee K.N. (2000): Key durability issues with mullite-based environmental barrier coatings for Si-based ceramics. - Transactions of the ASME, vol.122, pp.632-636.
- Miller R.A. (1987): Progress towards life modelling of thermal barrier coatings for air craft gas turbine engines. - Trans. of the ASME, pp.109-112.
- Mumm D.R. and Evans A.G. (2000): On the role of imperfections in the failure of TBC made by electro beam deposition. - Acta Mat., vol.48, pp.1815-1827.
- Pan D., Chen M.W., Wright P.K. and Hemker K.J. (2003): Evolution of a diffusion aluminide bond coat for thermal barier coatings during thermal cycling. - Acta Mat, vol.51, pp.2205-2217.
- Shillington E.A.G. and Clarke D.R. (1999): Spalling failure of a thermal barrier coating associated with aluminium depletion in the bond coat. - Acta Mat, vol.47, pp.1297-1305.
- Tolpygo V.K. and Clarke D.V. (1998): Competition during oxidation between stress generation and relaxation in alumina formed by oxidation in TBC. - Oxid. Metals, vol.49, pp.187-211.
- Trager T. (2003): A life time model for ceramic TBCs. - Material Science and Engineering A, pp.255-265.
- Wright P.K. and Evans A.G. (1999): Mechanisms governing the performance of TBCs. - Current Opinions in Solid State and Mater Sci., vol.4, pp.255-65.
- Wright P.K. (1998): Influence of cyclic strain on life of TBC. - Mater. Sci. Engg., A, vol.245, pp.191-200.
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-article-BPZ5-0017-0037