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

Yunxin Wu, Lei Han, Hai Gong, Jiangang Yang and Wei Li
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Yunxin Wu: Research Institute of Light Alloys, Central South University, Changsha 410083, China
Lei Han: Research Institute of Light Alloys, 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

Energies, 2017, vol. 10, issue 10, 1-11

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.

Keywords: coil configuration; conversion efficiency; electromagnetic acoustic transducer; numerical model; 7050 aluminum alloy (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2017
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