Applications of Laser Scanning Thermographic NDT Technique in Aircraft Engine Coatings
摘 要
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。
Abstract
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.
中图分类号 TG115.28 DOI 10.11973/wsjc201808004
所属栏目 试验研究
基金项目
收稿日期 2018/3/16
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备注江海军(1988-),男,硕士,光学工程师,主要从事红外无损检测技术研究
引用该论文: JIANG Haijun,CHEN Li,SU Qingfeng,XING Jianxiang. Applications of Laser Scanning Thermographic NDT Technique in Aircraft Engine Coatings[J]. Nondestructive Testing, 2018, 40(8): 15~19
江海军,陈力,苏清风,邢建湘. 激光扫描热波无损检测技术在航空发动机涂层中的应用[J]. 无损检测, 2018, 40(8): 15~19
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参考文献
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【2】郝兵,李成刚.表面涂层技术在航空发动机上的应用[J].航空发动机,2004,30(4):38-40.
【3】XUE Y Q,KENNEDY D,MIHAYLOVE E. Electronic speckle pattern shearing interferometry for nondestructive testing of thermal sprayed alloy coating[J]. Proc. of SPIE, 2005,58(24):241-249.
【4】BISON P G, MARINETTI S, GRINZHTO E, et al. Inspecting thermal barrier coatings by IR thermography[J]. Thermosense XXV Proceedings of SPIE,2003,50(73):318-327.
【5】SHAO Y F, DU R Q, WU X F, et al. Effect of porosity on the crack pattern and residual strength of ceramics after quenching[J]. Journal of Materials Science,2013,48(8):6431-6436.
【6】谢兴盛,颜芳,陆佳佳,等.红外热波无损检测技术在涡轮叶片探伤中的应用[J].红外技术,2007,29(9):552-555.
【7】冯驰,滑翔.红外热波技术在涡轮叶片涂层检测上的应用[J].应用科技,2015,42(1):15-18.
【8】刘颖韬,牟仁德,郭广平,等.热障涂层闪光灯激励红外热像检测[J].航空材料学报,2015,35(6):83-90.
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【10】江海军,陈力,张淑仪.激光扫描红外热波成像的温度场分析[J].无损检测,2014,36(11):24-27.
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