Ultrafast phased-array imaging with pump excitation for closed-crack imaging

被引：6

作者：

Ohara, Yoshikazu ^{[1
]}

Haupert, Sylvain ^{[2
]}

Li, Sinan ^{[3
]}

机构：

[1] Tohoku Univ, Dept Mat Proc, Aoba Ku, 6-6-02 Aoba, Sendai, Miyagi 9808579, Japan

[2] Sorbonne Univ, CNRS UMR 7371, INSERM UMR S 1146, Lab Imagerie, Paris, France

[3] Verasonics Inc, Mat & Earth Sci Business Unit, Kirkland, WA 98034 USA

来源：

APPLIED PHYSICS EXPRESS | 2021年 / 14卷 / 12期

关键词：

nondestructive testing; nonlinear ultrasonics; ultrasonic phased array; plane wave imaging; closed cracks; crack opening; closing behaviors; SPECTROSCOPY;

D O I：

10.35848/1882-0786/ac3d1e

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Nondestructive evaluation of closed cracks is one of the most challenging problems in ultrasonic testing. Here, we propose a novel closed-crack imaging technique combining ultrafast phased-array with pump excitation. The pump excitation with kHz frequency can effectively induce the crack opening/closing behaviors since it can generate a large displacement of 1000 nm order. At the same time, ultrafast phased-array imaging, i.e. plane wave imaging, with MHz frequency stroboscopically captures the high-speed crack dynamics induced by pump excitation. We successfully proved the concept in a closed fatigue crack specimen.

引用

页数：5

共 41 条

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