Effect of Temperature-Dependent Properties on Cyclic Plasticity of Bond Coat in Thermal Barrier Systems

Abstract:

The accumulation of cyclic plasticity in bond coat (BC) is a key factor controlling the displacement instability of the thermally grown oxide (TGO) in thermal barrier systems. The cyclic plasticity is affected by the component material properties, which vary observably with the service temperature. A numerical model with the behavior of creep and thermal growth in TGO under thermal cycling is used to explore the effect of temperature-dependent properties on cyclic plasticity in BC. The influence of temperature-dependent Young's modulus of thermal barrier coating (TBC), TGO, BC and substrate, thermal expansion coefficient of TBC, BC and substrate, and the yield strength of BC on cyclic plasticity in BC is discussed respectively.

• Periodical: Key Engineering Materials (Volumes 535-536)
• Pages: 193-196
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.535-536.193
• Online since: January 2013
• Authors: Luo Chuan Su, Jian Guo Li, Wei Xu Zhang, Tie Jun Wang
• Keywords: Cyclic Plasticity, Temperature-Dependent Properties, Thermal Barrier Coating (TBC)

References

[1] Karlsson, A.M., J.W. Hutchinson, and A.G. Evans, A fundamental model of cyclic instabilities in thermal barrier systems. Journal of the Mechanics and Physics of Solids, 2002. 50(8): pp.1565-1589.

DOI: 10.1016/s0022-5096(02)00003-0

[2] Karlsson, A.M., C.G. Levi, and A.G. Evans, A model study of displacement instabilities during cyclic oxidation. Acta Materialia, 2002. 50(6): pp.1263-1273.

DOI: 10.1016/s1359-6454(01)00403-7

[3] W.X. Zhang, X.L. Fan, and T.J. Wang, The surface cracking behavior in air plasma sprayed thermal barrier coating system incorporating interface roughness effect. Applied Surface Science, 2011.258: pp.811-817.

DOI: 10.1016/j.apsusc.2011.08.103

[4] Olsson, M., A.E. Giannakopoulos, and S. Suresh, Elastoplastic Analysis of Thermal Cycling - Ceramic Particles in a Metallic Matrix. Journal of the Mechanics and Physics of Solids, 1995. 43(10): pp.1639-1671.

DOI: 10.1016/0022-5096(95)00046-l

[5] Cheng, J., et al., Thermal/residual stress in an electron beam physical vapor deposited thermal barrier coating system. Acta Materialia, 1998. 46(16): pp.5839-5850.

DOI: 10.1016/s1359-6454(98)00230-4

[6] Ambrico, J.M., M.R. Begley, and E.H. Jordan, Stress and shape evolution of irregularities in oxide films on elastic-plastic substrates due to thermal cycling and film growth. Acta Materialia, 2001. 49(9): pp.1577-1588.

DOI: 10.1016/s1359-6454(01)00059-3

[7] Karlsson, A.M. and G. Evans, A numerical model for the cyclic instability of thermally grown oxides in thermal barrier systems. Acta Materialia, 2001. 49(10): pp.1793-1804.

DOI: 10.1016/s1359-6454(01)00073-8

[8] Kang, K.J. and C. Mercer, Creep properties of a thermally grown alumina. Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing, 2008. 478(1-2): pp.154-162.

DOI: 10.1016/j.msea.2007.05.114

[9] Evans, A.G., M.Y. He, and J.W. Hutchinson, Mechanics-based scaling laws for the durability of thermal barrier coatings. Progress in Materials Science, 2001. 46(3-4): pp.249-271.

DOI: 10.1016/s0079-6425(00)00007-4