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Effect of Coil Configuration on Conversion Efficiency of EMAT on 7050 Aluminum Alloy

Author

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  • Yunxin Wu

    (Research Institute of Light Alloys, Central South University, Changsha 410083, China
    State Key Laboratory of High-Performance Complex Manufacturing, Central South University, Changsha 410083, China
    Nonferrous Metal Oriented Advanced Structural Material and Manufacturing Cooperative Innovation Center, Central South University, Changsha 410083, China)

  • Lei Han

    (Research Institute of Light Alloys, Central South University, Changsha 410083, China
    State Key Laboratory of High-Performance Complex Manufacturing, Central South University, Changsha 410083, China
    Nonferrous Metal Oriented Advanced Structural Material and Manufacturing Cooperative Innovation Center, Central South University, Changsha 410083, China)

  • Hai Gong

    (State Key Laboratory of High-Performance Complex Manufacturing, Central South University, Changsha 410083, China)

  • Jiangang Yang

    (State Key Laboratory of High-Performance Complex Manufacturing, Central South University, Changsha 410083, China)

  • Wei Li

    (State Key Laboratory of High-Performance Complex Manufacturing, Central South University, Changsha 410083, China)

Abstract

Compared to traditional ultrasonic detection methods, the electromagnetic acoustic transducer (EMAT) technique can be applied in many hostile environments such as elevated temperatures, on-line inspections, etc. However, the EMAT technique has a low conversion efficiency. This paper develops a numerical model to study the effects of the coil configurations on the conversion efficiency of shear-wave EMAT on 7050 aluminum alloy. The numerical model is fully validated by the experiment data. The effects of the configuration parameters, including the coil wires’ cross-sectional area, coil wires’ cross-sectional shape, and distance between coil wires, on the conversion efficiency are then discussed. The results indicate that after using the coil with a square cross-section, the conversion efficiency of EMAT is increased by 22.5%. In addition, the coil wires’ cross-sectional area and the distance between coil wires also have a significant effect on the conversion efficiency.

Suggested Citation

  • Yunxin Wu & Lei Han & Hai Gong & Jiangang Yang & Wei Li, 2017. "Effect of Coil Configuration on Conversion Efficiency of EMAT on 7050 Aluminum Alloy," Energies, MDPI, vol. 10(10), pages 1-11, September.
    • Handle: RePEc:gam:jeners:v:10:y:2017:i:10:p:1496-:d:113295
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    References listed on IDEAS

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    1. Cheng, Liang & Kogia, Maria & Mohimi, Abbas & Kappatos, Vassilios & Selcuk, Cem & Gan, Tat-Hean, 2017. "Crack characterisation using invariable feature extraction in stainless steel specimen used for absorber tubes of CSP applications via EMAT," Renewable Energy, Elsevier, vol. 101(C), pages 771-781.
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