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JWJ > Volume 33(4); 2015 > Article
Journal of Welding and Joining 2015 August;33(4) :63-67.
Published online August 31, 2015.
doi:https://doi.org/10.5781/JWJ.2015.33.4.63
Development of New Low Frequency ECT Sensor to Detect Inner Defects(II) - Application to Welding Specimens Included Defects -
Jeong-Ung Park*, Mun-Seok Jang**, Guk-Ju Gim***, Beom-Ki Kim***
*Dept. of Civil Engineering, Chosun University, Gwangju 501-759, Korea
**Dept. of Civil Engineering, Graduate School, Chosun University, Gwangju 501-759, Korea
***Randin Corporation, Seoul 34590, Korea
Correspondence: Jeong-Ung Park  Email: jupark@chosun.ac.kr
  Published online August 31, 2015
ABSTRACT
Non-destructive techniques are used widely in the metal industry in order to control the quality of materials. Eddy current testing(ECT) is one of the most extensively used non-destructive techniques for inspecting electrically conductive materials at very high speeds that does not require any contact between the test piece and the sensor. The New ECT sensor which can detect inner defects was developed regardless the condition of surface. This sensor is verified to do experiment which measure the loss of induced electromotive force. The loss of induced electromotive force was measured in 5.4% and this low frequency ECT device can detect internal defects at depth 20 mm.
Keywords: Non-destructive techniques | Eddy current testing | Artificial flaws | Low frequency ECT
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Development of New Low Frequency ECT Sensor to Detect Inner Defects(I) - Characteristic of Loss of Induced Electromotive Force -  2015 August;33(4)
Development of New Low Frequency ECT Sensor to Detect Inner Defects(I) - Characteristic of Loss of Induced Electromotive Force -  2015 August;33(4)
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