Abstract
The damping property of MCrAlY coating prepared by air plasma spraying (APS) and electron beam physical vapor deposition (EB-PVD) was studied with dynamic mechanical thermal analyzer. The damping property of interface microstructure of MCrAlY coating was discussed, and the ANSYS finite element analysis method was used to analyze the σx and σy of interface structure of MCrAlY coating. The damping energy dissipation of “horizontal” interface structure and “vertical” interface structure was researched. The results have shown that, the damping of “vertical” interface structure was slightly higher than the damping of “horizontal” interface structure in the same bending vibration loading environment. The mechanical energy dissipation produced by APS coating structure and EB-PVD coating structure may be different. The slipping of interface between coating and substrate was dominated in the interface damping of APS coating, while in the interface damping of EB-PVD coating structure the both interface slip and crack extension contributed. Reasonable design “vertical” interface structural may be able to help mechanical energy dissipation in the bending vibration environment and improve damping performance.
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