Application of Laser-Generated Ultrasound for Evaluation of Thickness Reduction in Carbon Steel Pipes

摘要:

文章预览

In carbon steel pipes of nuclear power plants, local wall thinning may result from erosion-corrosion or flow-accelerated corrosion(FAC) damage. Local wall thinning is one of the major causes for the structural fracture of these pipes. Therefore, assessment of local wall thinning due to corrosion is an important issue in nondestructive evaluation for the integrity of nuclear power plants. In this study, laser-generated ultrasound technique was employed to evaluate local wall thinning due to corrosion. Guided waves were generated in the thermoelastic regime using a Q-switched pulsed Nd:YAG laser with a linear slit array. . In this paper, time-frequency analysis of ultrasonic waveforms using wavelet transform allowed the identification of generated guided wave modes by comparison with the theoretical dispersion curves. Modes conversion and group velocity were employed to detect thickness reduction.

信息:

期刊:

编辑:

Seung-Seok Lee, Joon Hyun Lee, Ik Keun Park, Sung-Jin Song, Man Yong Choi

页数:

743-746

引用:

J. H. Park et al., "Application of Laser-Generated Ultrasound for Evaluation of Thickness Reduction in Carbon Steel Pipes", Key Engineering Materials, Vols. 321-323, pp. 743-746, 2006

上线时间:

October 2006

输出:

价格:

$38.00

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