한국생산제조학회지 (Journal of the Korean Society of Manufacturing Technology Engineers)

  • 제25권1호
  • /
  • Pages.48-53
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  • 2016
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  • 2508-5093(pISSN)
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  • 2508-5107(eISSN)
한국생산제조학회 (The Korean Society of Manufacturing Technology Engineers)
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비접촉 SH-EMAT을 이용한 TIG용접부 건전성 평가

Evaluation of the Integrity of TIG Welding Using Non-Contact SH-EMAT

  • Park, Tae Sung (Department of Mechanical & Automotive Engineering, Seoul Nat'l Univ. of Science & Technology) ;
  • Park, Yeong Hwan (Department of Mechanical Engineering, Pukyong Nat'l University) ;
  • Park, Ik Keun (Department of Mechanical & Automotive Engineering, Seoul Nat'l Univ. of Science & Technology)
  • 투고 : 2016.01.27
  • 심사 : 2016.02.14
  • 발행 : 2016.02.15
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초록

An EMAT can be used to reliably detect defects as it serves as a non-contact transducer with the ability to transmit ultrasonic waves into specimens without couplant. Moreover, an EMAT can easily generate desired waves by altering the design of the coil and magnet. This study proposes an SH-EMAT to evaluate the integrity of the TIG welding part. A stainless steel was welded using the TIG welding method. The welding current was varied to create artificial defects. Both the PA-UT and the RT were applied to verify the defect size. The experimental results generated by using the EMAT were compared with those methods. The amplitude was observed to decrease with an increase in the defect size. These results confirmed that the presence of defects can be reliably detected by attenuation of signal amplitude. The results demonstrated that the proposed method is suitable for evaluating the integrity of TIG welding.

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참고문헌

  1. Kim, J., Kim, B., Lee, C., Kim, Y., Park, Y., 2015, Study on The Status of Welded Parts According to The Types of Shielding Gas in TIG Welding, Journal of the Korean Society of Manufacturing Process Engineers, 14:2 38-43. https://doi.org/10.14775/ksmpe.2015.14.2.038
  2. Song, K., Yoo, H., Lee, C., 1994, A Technical Report on the Evaluation of the Integrity for the TIG Welded Spacer Grid, Korea Atomic Energy Research Institute, KAERI/RT-448/94.
  3. Yoon, S., Kim, J., Song, K., Cha, Y., 2006, The Development of Automatic Inspection System for Flaw Detection in Welding Pipe, Transactions of the Korean Society of Machine Tool Engineers, 15:2 87-92.
  4. Jhang, K., Kim, H., Cerniglia, D., Djordjevic, B., 2001, Non-contact Ultrasonic Nondestructive Evaluation/Inspection using Laser Generation and Air Coupled Transducer, Conference Proceeding of The Korean Society of Mechanical Engineers, 86-92.
  5. Park, I., Lee, C., Kim, H., Park, T., Kim, Y., Cho, Y., Song, W., Ann, H., 2005, Non-contact Ultrasonic Inspection Technology of Fillet Weldments, Journal of The Korean Welding & Joining Society, 23:5 8-43.
  6. Lee, J., Park, I., Kim, Y., Kim, D., 2011, Evaluation of Thickness Reduction in Steel Plate by Using SH-EMATs, Journal of the Korean Society for Nondestructive Testing, 31:1 47-52.
  7. Ahn, B., Kim, Y., Kim, Y., Lee, S., 2004, Development of an EMAT System for Detection Flaws in Pipeline, Journal of the Korean Society for Nondestructive Testing, 24:1 15-21.
  8. Murayama, R., 2002, A Survey of Electromagnetic Acoustic Transducer, Journal of Japanese Society for Nondestructive Inspection, 51:2 63-67.
  9. Hirao, M., Ogi, H., 2002, Noncontact Monitoring of a Process with Electromagnetic Acoustic Resonance, Journal of Japanese Society for Nondestructive Inspection, 51:2 79-82.
  10. Ahn, B., Kim, Y., Kim, Y., Lee, S., 2000 Characteristics of Magnetostrictive Sensor for Detecting the Flaws in Pipe, 20:1 46-53
  11. Hirao, M., Ogi, H., 2003, EMATs for Science and Industry Noncontacting Ultrasonic Measurements, Springer Science Business Media, New York.