Surface crack detection of the abradable seal coating by laser bidirectional scanning thermography
Infrared Physics & Technology(2023)
摘要
•Laser bidirectional scanning thermography was introduced to detect the surface cracks of the abradable seal coating.•Distinguish between crack defects and non-defects by the attribute of directional difference of thermal signals.•The thermal image sequence normalization algorithm was introduced.•The effect of the difference in optical properties between coating surface phases is suppressed.
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关键词
Laser thermography,Image normalization,Abradable seal coating,Surface cracks
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