Applications of MsT Probes for Guided Wave Testing of Components

Magnetostrictively generated guided waves have been used for many years for long-range inspection of a number of components, including piping, anchor rods, plates, and others. Magnetostrictive sensors technology (MsS) have been used for most of this work. A recent modification of the MsS sensor design, which is called “MsT” or the magnetostrictive transducer, provided improvement in the signal amplitude of as much as 20 dB. Significant improvement in the signal amplitude facilitated the ability to extend the inspection range in difficult applications, such as buried and coated pipes, anchor rods, and heat exchanger tubing. Increased signal amplitude also facilitated higher sensitivity of the transducer in a number of the cases. In this paper, the technology and the improvement in signal amplitude will be discussed. Ruggedized versions of the MsTs will be described together with a transducer coupling concept suitable for field applications. A status of current developmental work targeting enhanced flaw characterization will also be presented.

1. Kwun, H., C. Dynes. “Long-range Guided Wave Inspection of Pipe Using the Magnetostrictive Sensor Technology – Feasibility of Defect Characterization,” Nondestructive evaluation of utilities and Pipelines II, International Society for Optical Engineering, SPIE, Volume 3400, 1998, pp.326-337. 2. Kwun, H. and G.M. Light. “Magnetostrictive Sensor Technology Proven in Process Applications,” Oil and Gas Journal, Volume 98.21, 2000. 3. Vinogradov, S. “Magnetostrictive Transducer for Torsional Mode Guided Wave in Pipes and Plates,” Materials Evaluation, Volume 67, No. 3, 2009, pp. 333–341. 4. Vinogradov, S. Method and System for Generating and Receiving Torsional Guided waves in a Structure, U.S. Patent 7, 821,258, October 26, 2010. 5. Kwun, H., J. Crane, S. Kim, A. Parvin and G. Light. “A torsional mode guided wave probe for long range in bore testing of heat exchanger tubing,” Materials Evaluation, Volume 62, No. 4, pp. 430-433, 2004. 6. Vinogradov, S. “Tuning of Torsional Mode Guided Wave Technology for Screening of Carbon Steel Heat Exchanger Tubing,” Materials Evaluation, Volume 66, No. 4, 2008, pp. 419–424. 7. Muthu, N. and S. Vinogradov. “Application of Guided Wave Technology for Screening of SeaCure Tubing,” 6th International EPRI Conference on NDE in Relation to Structural Integrity of Nuclear and Pressurized Components, Budapest, Hungary, 2007. 8. Rose, J.L., Z. Sun, P.J. Mudge and M.J Avioli. “Guided wave flexural mode tuning and focusing for pipe inspection,” Materials Evaluation, Volume 61, No. 2, pp. 162-167, 2003. 9. Davies, J. and P. Cawley. “The Application of Synthetic Focusing for Imaging Crack-Like Defects in Pipelines Using Guided Waves,” IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, Volume 56, No. 4, April 2009. 10. Vinogradov, S. and C. Barrera. “Development of Guided Wave Examinations of Piping and Tubing Using Magnetostrictive Sensor Technology,” 8th International EPRI Conference on NDE in Relation to Structural Integrity of Nuclear and Pressurized Components, Berlin, Germany, 2010
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