Abstract
Gas turbines of aircraft and power generation plants operate at a high turbine inlet temperature (TIT) or combustion temperature higher than 1,000°C to obtain high thermal efficiency. The parts directly in contact with the high temperature flame are made of a nickel-base superalloy, which has strong heat resistance. In addition, the thermal barrier coating (TBC) technique is applied to increase the heat resistance. The TBC prevents direct heat transfer from the high temperature flame to the metallic substrate. Thus, the TBC technique reduces the substrate surface temperature by approximately 100~170°C. The delamination caused by the growth of thermally grown oxide (TGO) decreases the life of the TBC system. In addition, gas turbine blades experience centrifugal forces owing to high speeds of approximately 3600 rpm and they experience low cycle fatigue because of frequent startup and shutdown. Therefore, the integrity of the TBC system should be evaluated under the thermal gradient mechanical fatigue condition. In this study, finite element analysis (FEA) was performed for the TBC model considering TGO, and the effect of TGO on TBC systems was evaluated under the thermal gradient mechanical fatigue condition.
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Abbreviations
- ε th :
-
thermal strain (%)
- ε mech :
-
mechanical strain (%)
- ε tot :
-
total strain (%)
References
Kim, M. Y., Park, S. Y., Yang, S. H., Choi, H. S., Ko, W., et al., “Analysis of Damage Trend for Gas Turbine 1st Bucket Related to the Change of Models,” Transactions of the Korean Society of Mechanical Engineers A, vol. 31, no. 6, pp. 718–724, 2007.
Shin, I. H., Lee, D. K., Koo, J. M., Seok, C. S., and Lee, T. W., “Evaluation of Failure Life of Thermal Barrier Coating applied Gas Turbine by Thermo-Mechanical Fatigue Test,” Proc. of KSPE Autumn Conference, pp. 621–622, 2010.
Lee, J. M., Seok, C. S., Lee, D., Kim, Y., Yun, J., et al., “Prediction of Thermo-Mechanical Fatigue Life of IN738LC using the Finite Element Analysis,” Int. J. Precis. Eng. Manuf., vol. 15, no. 8, pp. 1733–1737, 2014.
Kim, Y., Seok, C. S., Lee, S. Y., Koo, J. M., Kim, S. H., et al., “Development of Thermal Gradient Prediction Method for Thermal Barrier Coating,” Int. J. Precis. Eng. Manuf., vol. 15, no. 6, pp. 1029–1033, 2014.
Kim, D., Koo, J., Seok, C., Won, J., Park, S., et al., “Thermal Fatigue Test Methods for Thermal Barrier Coatings of Gas Turbine Blade,” J. Korean Soc. Precis. Eng., vol. 26, no. 2, pp. 7–15, 2009.
Levi, C. G., Sommer, E., Terry, S. G., Catanoiu, A., and Rühle, M., “Alumina Grown During Deposition of Thermal Barrier Coatings on NiCrAlY,” Journal of the American Ceramic Society, vol. 86, no. 4, pp. 676–685, 2003.
Quadakkers, W. J., Shemet, V., Sebold, D., Anton, R., Wessel, E., et al., “Oxidation Characteristics of a Platinized Mcraly Bond Coat for TBC Systems During Cyclic Oxidation at 1000°C,” Surface and Coatings Technology, vol. 199, no. 1, pp. 77–82, 2005.
Koo, J. M. and Seok, C. S., “Design Technique for Improving the Durability of Top Coating for Thermal Barrier of Gas Turbine,” J. Korean Soc. Precis. Eng. Vol. 31, No. 1 pp. 15–20, 2014.
Almeida, D., Silva, C., Nono, M., and Cairo, C., “Thermal Conductivity Investigation of Zirconia Co-Doped with Yttria and Niobia EB-PVD Tbcs,” Materials Science and Engineering: A, vol. 443, no. 1, pp. 60–65, 2007.
Arnold, S. M., Pindera, M.-J., and Aboudi, J., “Analysis of Plasma- Sprayed Thermal Barrier Coatings with Homogeneous and Heterogeneous Bond Coats under Spatially Uniform Cyclic Thermal Loading,” NASA/TM-2003-210803, 2003.
Ferguson, B., Petrus, G., and Krauss, T., “Modeling of Thermal Barrier Coatings,” NASA Contractor Report, Paper No. NAS-26664, 1992.
Liu, A. and Wei, Y., “Finite Element Analysis of Anti-Spallation Thermal Barrier Coatings,” Surface and Coatings Technology, vol. 165, no. 2, pp. 154–162, 2003.
Kitazawa, R., Kakisawa, H., and Kagawa, Y., “Anisotropic TGO Morphology and Stress Distribution in EB-PVD Y2O3-ZrO2 Thermal Barrier Coating after in-Phase Thermo-mechanical Test,” Surface and Coatings Technology, vol. 238, pp. 68–74, 2014.
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Lee, JM., Song, H., Kim, Y. et al. Evaluation of thermal gradient mechanical fatigue characteristics of thermal barrier coating, considering the effects of thermally grown oxide. Int. J. Precis. Eng. Manuf. 16, 1675–1679 (2015). https://doi.org/10.1007/s12541-015-0220-0
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DOI: https://doi.org/10.1007/s12541-015-0220-0