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Research on electromagnetic acoustic resonance for plastic deformation in Q235 steel电磁声谐振对Q235钢压缩形变评价研究

Lookup NU author(s): Professor Gui Yun TianORCiD

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Abstract

© 2019, Science Press. All right reserved.Inspection of plastic deformation in structural specimen is one key problem for safe operation and maintenance. In this paper, a contactless ultrasonic testing method using an electromagnetic acoustic transducer in resonant mode is proposed to solve the problem of plastic deformation in Q235 steel. Compared with conventional ultrasonic pulse echo method for plastic deformation inspection, the use of resonant ultrasonic signals and signal processing with power spectrum analysis can significantly enhance signal amplitude of the electromagnetic acoustic resonance (EMAR). The double wave superposition of nth compression and double wave multiplication of nth compression are applied to increase the signal-to-noise ratio and detecting ability of the resonant wave crests. The absolute error of EMAR detection in the standard specimens measurement is smaller than 0.2%, which demonstrates the capability of this plastic deformation in Q235 steel.

Publication metadata

Author(s): Cai Z, Chen L, Zhao Z, Tian G

Publication type: Article

Publication status: Published

Journal: Yi Qi Yi Biao Xue Bao/Chinese Journal of Scientific Instrument

Year: 2019

Volume: 40

Issue: 5

Pages: 153-160

Online publication date: 31/07/2019

Acceptance date: 02/04/2019

ISSN (electronic): 0254-3087

Publisher: Science Press

URL: https://doi.org/10.19650/j.cnki.cjsi.J1904962

DOI: 10.19650/j.cnki.cjsi.J1904962

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