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Energies 2017, 10(10), 1496; doi:10.3390/en10101496

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

1,2,3,* , 1,2,3
,
2
,
2
and
2
1
Research Institute of Light Alloys, Central South University, Changsha 410083, China
2
State Key Laboratory of High-Performance Complex Manufacturing, Central South University, Changsha 410083, China
3
Nonferrous Metal Oriented Advanced Structural Material and Manufacturing Cooperative Innovation Center, Central South University, Changsha 410083, China
*
Author to whom correspondence should be addressed.
Received: 11 August 2017 / Revised: 6 September 2017 / Accepted: 20 September 2017 / Published: 26 September 2017
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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. View Full-Text
Keywords: coil configuration; conversion efficiency; electromagnetic acoustic transducer; numerical model; 7050 aluminum alloy coil configuration; conversion efficiency; electromagnetic acoustic transducer; numerical model; 7050 aluminum alloy
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Wu, Y.; Han, L.; Gong, H.; Yang, J.; Li, W. Effect of Coil Configuration on Conversion Efficiency of EMAT on 7050 Aluminum Alloy. Energies 2017, 10, 1496.

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