Finite element simulation of the indentation behavior of the thermal barrier coatings prepared by electrical beam-physical vapor deposition
Surface micro-compression is a very important technique to characterize the mechanical properties and elastic/plastic response behavior of film and coating systems. In this paper, surface micro-compression simulation for thermal barrier coatings (TBCs) fabricated by Electrical Beam-Physical Vapor Deposition (EB-PVD) was performed by finite element method. The influence of the indenter shaper on the elastic/plastic response behavior of the as-prepared TBC has been compared and discussed in detail. Especially, the interactions among the inner sub-grains which are lean to the bond-coat were also considered in the present simulation for the first time. The simulation results indicate that the coefficient of the exterior columnar grain play an important role in affecting the elastic/plastic mechanical response behavior under the application of spherical indenter, while the coefficient of the inner finer sub-grains which are grown in the columnar grain play an important role in affecting the elastic/plastic mechanical response behavior under the application of flat indenter. The micro mechanism of the micro-compression behavior was discussed in detail in this study.
thermal barrier coatings micro-compression high temperature columnar grain shear bands
L．Wang Y．Wang X．G Sun
State Key Laboratory ofHigh Performance Ceramics and Supetfine Microstructure，Shanghai Institute ofC Laboratory ofNano Surface Engineering,Department ofMaterials Science,School ofMaterials Science and
国际会议
北京
英文
868-878
2012-10-23（万方平台首次上网日期，不代表论文的发表时间）