The Use of Flexible Ultrasound Transducers for the Detection of Laser-Induced Guided Waves on Curved Surfaces at Elevated Temperatures
| Autor: | Che Hua Yang, Makiko Kobayashi, Tai Chieh Wu, Masayuki Tanabe |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Materials science
Wave propagation defect detection Acoustics laser ultrasonic technique Non-destructive testing lcsh:Chemical technology 01 natural sciences Biochemistry Article Analytical Chemistry law.invention flexible ultrasonic transducer laser ultrasonic visualization material characterization high temperature measurement law Nondestructive testing 0103 physical sciences Dispersion (optics) lcsh:TP1-1185 Electrical and Electronic Engineering 010301 acoustics Instrumentation 010302 applied physics business.industry Ultrasonic testing Laser Piezoelectricity Atomic and Molecular Physics and Optics Transducer Ultrasonic sensor business |
| Zdroj: | Sensors, Vol 17, Iss 6, p 1285 (2017) Sensors; Volume 17; Issue 6; Pages: 1285 Sensors (Basel, Switzerland) |
| ISSN: | 1424-8220 |
| Popis: | In this study, a flexible ultrasonic transducer (FUT) was applied in a laser ultrasonic technique (LUT) for non-destructive characterization of metallic pipes at high temperatures of up to 176 °C. Compared with normal ultrasound transducers, a FUT is a piezoelectric film made of a PZT/PZT sol-gel composite which has advantages due to its high sensitivity, curved surface adaptability and high temperature durability. By operating a pulsed laser in B-scan mode along with the integration of FUT and LUT, a multi-mode dispersion spectrum of a stainless steel pipe at high temperature can be measured. In addition, dynamic wave propagation behaviors are experimentally visualized with two dimensional scanning. The images directly interpret the reflections from the interior defects and also can locate their positions. This hybrid technique shows great potential for non-destructive evaluation of structures with complex geometry, especially in high temperature environments. |
| Databáze: | OpenAIRE |
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