In-Process Damage Monitoring and Stress Analysis of Thermal Spray Coating

Abstract:

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AE method is a well-known technique for in-situ monitoring of damage behavior by attached piezoelectric transducer. However, this conventional detection of AE signals has certain limitations. In recent years, numerous efforts have addressed the substitution of laser-based techniques for ultrasonic nondestructive evaluation in place of conventional piezoelectric transducers. Especially, a laser interferometer can be used to measure a displacement or velocity at materials surface using Doppler-shift. However, there are few reports referring to the detection of AE signals in the practical materials and testing because of the difficulty of experiments. We developed the AE measurement system with laser interferometer to apply this technique to microcrack evaluation and reported the quantitative AE analysis in various materials. This paper demonstrates AE results from thermal spray coatings at elevated temperature.

Info:

Periodical:

Key Engineering Materials (Volumes 353-358)

Edited by:

Yu Zhou, Shan-Tung Tu and Xishan Xie

Pages:

2403-2406

DOI:

10.4028/www.scientific.net/KEM.353-358.2403

Citation:

K. Taniguchi et al., "In-Process Damage Monitoring and Stress Analysis of Thermal Spray Coating", Key Engineering Materials, Vols. 353-358, pp. 2403-2406, 2007

Online since:

September 2007

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Price:

$35.00

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