Modelling the high temperature behaviour of TBCs using sequentially coupled microstructural-mechanical FE analyses

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING

卷:513-14

Article

Hermosilla, U.¹  Karunaratne, M. S. A.²  Jones, I. A.¹  Hyde, T. H.¹  Thomson, R. C.² 

[1] Univ Nottingham, Fac Engn, Div Mat Mech & Struct, Nottingham NG7 2RD, England

[2] Univ Loughborough, Dept Mat, Loughborough LE11 3TU, Leics, England

关键词: Thermal barrier coating;    Finite element analysis;    Eshelby;    Creep;    Oxidation;    Stress accumulation;   

DOI  :  10.1016/j.msea.2009.02.006

来源: Elsevier

【 摘 要 】

Thermal barrier coatings provide a means of thermal insulation of gas turbine components exposed to elevated temperatures. They undergo severe microstructural changes and material degradation, which have been implemented in this work by means of a sequentially coupled microstructural mechanical calculation that made use of a self-consistent constitutive model within finite element calculations. Analyses for different temperatures and bond coat compositions were run, which reproduced the trends reported in previous research and identified the accumulation of high out-of-plane tensile stresses within the alumina layer as an additional phenomenon that could drive high temperature crack nucleation. (c) 2009 Elsevier B.V. All rights reserved.

【 授权许可】

Free