Phased array ultrasonic testing of dissimilar metal welds using geometric based referencing delay law technique

Taeyoung Han, Kyounghee Kim, Martin Barth, Andreas Brusinsky, Frank Schubert, Seungpyo Lee, Jongbum Seo, Norbert Meyendorf

Research output: Contribution to conferencePaper

Abstract

Phased array ultrasonic testing (PAUT) techniques are widely used for the non-destructive testing (NDT) of austenitic welds to find defects like cracks. However, the propagation of ultrasound waves through the austenitic material is intricate due to its inhomogeneous and anisotropic nature. Such a characteristic leads beam path distorted which causes the signal to be misinterpreted. By employing a reference block which is cutout from the mockup of which the structure is a dissimilar metal weld (DMW), a new method of PAUT named as Referencing Delay Law Technique (RDLT) is introduced. With the RDLT, full matrix capture (FMC) was used for data acquisition. To reconstruct the images, total focusing method (TFM) was used. After the focal laws were calculated, PAUT was then performed. As a result, the flaws are more precisely positioned with significantlyincreased signal-to-noise ratio (SNR).

Original languageEnglish
Publication statusPublished - 2013 Jan 1
Event7th International Workshop NDT in Progress: NDT of Lightweight Materials - Dresden, Germany
Duration: 2013 Nov 72013 Nov 8

Other

Other7th International Workshop NDT in Progress: NDT of Lightweight Materials
CountryGermany
CityDresden
Period13/11/713/11/8

All Science Journal Classification (ASJC) codes

  • Mechanical Engineering
  • Safety, Risk, Reliability and Quality
  • Computer Science Applications
  • Modelling and Simulation
  • Industrial and Manufacturing Engineering
  • Mechanics of Materials

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  • Cite this

    Han, T., Kim, K., Barth, M., Brusinsky, A., Schubert, F., Lee, S., Seo, J., & Meyendorf, N. (2013). Phased array ultrasonic testing of dissimilar metal welds using geometric based referencing delay law technique. Paper presented at 7th International Workshop NDT in Progress: NDT of Lightweight Materials, Dresden, Germany.