| GUO Wei,DONG Li-hong,WANG Hai-dou,XING Zhi-guo,FEGN Fu-zhou,GAO Zhi-feng,WANG Bo-zheng.Inspection of Substrate Crack under Spray Coating by Ultrasonic Thermography[J],48(12):369-375 |
| Inspection of Substrate Crack under Spray Coating by Ultrasonic Thermography |
| Received:March 14, 2019 Revised:December 20, 2019 |
| View Full Text View/Add Comment Download reader |
| DOI：10.16490/j.cnki.issn.1001-3660.2019.12.045 |
| KeyWord:spray coating fatigue crack defect ultrasonic thermography image processing phase of thermal wave |
| Author | Institution |
| GUO Wei |
1.a.Key Laboratory for National Defense Science and Technology on Equipment Remanufacturing, b.Department of Vehicle Engineering, Army Academy of Armored Forces, Beijing , China |
| DONG Li-hong |
1.a.Key Laboratory for National Defense Science and Technology on Equipment Remanufacturing, Army Academy of Armored Forces, Beijing , China |
| WANG Hai-dou |
1.a.Key Laboratory for National Defense Science and Technology on Equipment Remanufacturing, Army Academy of Armored Forces, Beijing , China |
| XING Zhi-guo |
1.a.Key Laboratory for National Defense Science and Technology on Equipment Remanufacturing, Army Academy of Armored Forces, Beijing , China |
| FEGN Fu-zhou |
1.b.Department of Vehicle Engineering, Army Academy of Armored Forces, Beijing , China |
| GAO Zhi-feng |
2.School of Material Science and Engineering, Xi’an University of Technology, Xi'an , China |
| WANG Bo-zheng |
3.School of Engineering and Technology, China University of Mining, Beijing , China |
|
| Hits: |
| Download times: |
| Abstract: |
| The work aims to validate a method for fatigue crack identification in the substrate under spray coating. Based on the thermal wave conduction theory, theoretical analysis, numerical simulation and experimental methods were utilized to analyze the superimposed interference effect and the phase deviation of surface thermal wave caused by the thermal wave generated by the substrate crack and the thermal wave with the same frequency generated by the spray coating crack in the process of propagating to the coating surface. Numerical simulation was utilized to investigate the regular pattern of superimposed interference between heat waves emitted from coating crack and substrate crack, and ultrasonic infrared thermal imaging test was carried out to detect the fatigue cracks of the substrate under the spray coating to verify the effectiveness of the method. After being excited by pulsed ultrasonic wave, the thermal wave generated by the substrate crack and the coating crack had superposition interference effect in the process of conducting to the surface, caused the phase deviation of the thermal wave on the coating surface. The phase deviation of the low-frequency thermal wave was more obvious than that of the high-frequency thermal wave. It is a feasible and efficient method to identify the fatigue cracks in substrate under the spray coating by PD. |
| Close |
|
|
|