Journal of the Korean Society for Nondestructive Testing (비파괴검사학회지)

The Korean Society for Nondestructive Testing (한국비파괴검사학회)
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Simulation of Ultrasonic Beam Focusing on a Defect in Anisotropic, Inhomogeneous Media

  • Jeong, Hyun-Jo (Division of Mechanical and Automotive Engineering, Wonkwang University) ;
  • Cho, Sung-Jong (Division of Mechanical and Automotive Engineering, Wonkwang University) ;
  • Erdenetuya, Sharaa (Division of Mechanical and Automotive Engineering, Wonkwang University) ;
  • Jung, Duck-Yong (Jaewoo Technology Company)
  • Received : 2011.09.16
  • Accepted : 2011.12.08
  • Published : 2011.12.30
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Abstract

In ultrasonic testing of dissimilar metal welds, application of phased array technique in terms of incident beam focusing is not easy because of complicated material structures formed during the multi-pass welding process. Time reversal(TR) techniques can overcome some limitations of phased array since they are self-focusing that does not depend on the geometrical and physical properties of testing components. In this paper, we test the possibility of TR focusing on a defect within anisotropic, heterogeneous austenitic welds. A commercial simulation software is employed for TR focusing and imaging of a side-drilled hole. The performance of time reversed adaptive focal law is compared with those of calculated focal laws for both anisotropic and isotropic welds.

Keywords

References

  1. J. Poguet, J. Marguet, F. Pichonnat and L. Chupin, "Phased array technology: concepts, probes and applications," NDT.net, Vol. 7, No. 5 (2002)
  2. C. Nageswaran, C. Carpentier and Y. Y. Tse, "Microstructural quantification, modelling and array ultrasonics to improve the inspection of austenitic welds," Insight, Vol. 51, No. 12, pp. 660-666 (2009) https://doi.org/10.1784/insi.2009.51.12.660
  3. J. Ye et al., "Model-based simulation of focused beam fields produced by a phased array ultrasonic transducer in dissimilar metal welds," NDT&E International, Vol. 44, pp. 290-296 (2011) https://doi.org/10.1016/j.ndteint.2011.01.003
  4. N. Chakroun, M. Fink and F. Wu, "Time reversal processing in ultrasonic nondestructive testing," IEEE Trans. Ultrason. Ferroelectr. Freq. Control, Vol. 42, pp. 1087-1098 (1995)
  5. H. Jeong, "Ultrasonic beam focusing and steering of array transducers based on a time-reversal process," Materials Evaluation, Vol. 67, pp. 721-729 (2009)
  6. P. Calmon, S. Mahaut, S. Chatillon and R. Raillon, "CIVA: An expertise platform for simulation and processing NDT data," Ultrasonics, Vol 44, pp 975-979 (2006) https://doi.org/10.1016/j.ultras.2006.05.218
  7. S. Mahaut, S. Chatillon, N. Leymarie, F. Jenson and P. Calmon, "Simulation tools for predicting nondestructive testing of heterogeneous and anisotropic structures," International Congress on Ultrasonics, April 9 13, - Vienna, Austria (2007)
  8. H. Chen, M. Li, J. Liu and Y. Li, "Application of ultrasonic simulation technology in technical justification of in-service inspection of nuclear power plant," 17th World Conference on NDT, Oct. 25-28, Shanghai, China (2008)
  9. H. Jeong, J.-S. Lee, C.-H. Lee and G.-C. Jun, "Time delay focusing of ultrasonic array transducers on a defect using the concept of a time reversal process, Journal of the Korean Society for Nondestructive Testing, Vol. 29, No. 6, pp. 550-556 (2009)
  10. M. Spies, "Modeling of transducer fields in inhomogeneous anisotropic materials using Gaussian beam superposition," NDT&E Int., Vol. 33, pp. 155-162 (2000) https://doi.org/10.1016/S0963-8695(99)00036-5
  11. Y.-S. Jang, J.-H. Kim, H. Jeong and Y.-H. Nam, "Measurement of ultrasonic velocity and attenuation by signal processing techniques in time and frequency domains," Journal of the Korean Society for Nondestructive Testing, Vol. 19, pp. 118-128 (1999)