激光扫描热波无损检测技术在航空发动机涂层中的应用

Applications of Laser Scanning Thermographic NDT Technique in Aircraft Engine Coatings

涂层技术在航空发动机中的应用越来越广泛,介绍了一种基于红外热波成像技术的无损检测方法,该方法采用激光扫描作为热激励源,通过红外热像仪采集红外图像序列并进行分析,从而得到检测结果。将其应用于航空发动机涂层内部缺陷的检测中,结果表明,其能快速检测出涂层的分层缺陷,并对较小缺陷具有一定的检测能力。最后,采用金相技术对试件进行解剖分析,验证了激光扫描热波无损检测的结果,表明该技术可对航空发动机涂层缺陷进行可靠地检测。

The application of coating technology is more and more widely used in aero engine.A nondestructive testing method based on infrared thermal wave imaging technology is introduced.The method uses laser scanning as the source of heat excitation,the infrared image sequence is collected and analyzed by infrared thermal imager,and the test results are obtained.It is applied to the interior of the aero engine coating.In the defect detection,the results show that it can detect the layer defects of the coating quickly and has certain detection ability for the smaller defects.Furthermore,the metallographic technique is used to dissect the specimen and verify the result of the nondestructive testing of the laser scanning thermal wave.It shows that the technology can reliably detect the defects of the aero engine coating.