Design and Optimization of Interface Morphology of Thermal Barrier Coatings Based on Regulation of Residual Stress: A Finite Element Simulation Study

Laser surface texture (LST) technology can be used to increase the adherence of thermal barrier coating (TBC). The primary research method is conduct a large number laser experiments determine optimal parameters. To minimize costs and enhance efficiency, in current work, five types circular pit textures were summarized; plane strain model was established using transient thermomechanical coupling finite element method; residual stress field after spraying as prestress field; influence different on distribution cycling analyzed; propagation law cracks predicted. work focuses on: (1) two-dimensional cross-sectional morphology texture; (2) principal s22 perpendicular interface (resulting mode I crack) shear s12 parallel II crack); (3) variables—diameter, depth, spacing. results revealed that cycling, ceramic top coat (TC) bore tensile around 350 MPa. Both sides metallic bond (BC) stress, while bottom compressive stress. Among them, positive with sinusoidal section greatest, whereas least. maximum increased diameter depth increased, minimum obtained by adjusting spacing among adjacent textures. level reduced selecting appropriate morphology, crack more complex, is, it took longer time before reaching failure, which expected improve life.