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Experimental Investigation of Weld Root to Throat Crack Recognition by Double-Probe Ultrasonic Testing

Experimental investigations were carried out to discover a possible approach to detect weld root to throat crack in deck-to-rib welded joints by ultrasonic testing. Twenty-three samples, manufactured with artificial cracks to simulate the welded parts of deck-to-rib, were subjected to ultrasonic testing. Crack features, such as width, length, depth, and propagation path, were considered. A technique involving double-probe ultrasonic testing was proposed. The transmitted signal’s amplitudes under different cases were compared. The results revealed that the ratio ωe of signal amplitude at the crack tip to the signal amplitude of uncracked areas was adopted to calculate crack length (a ωe value of one-third is suggested). Additionally, a D-A curve comparison technique (where D is the distance between the probe index to the weld toe and A is the wave signal amplitude) was proposed based on the test results. According to the relationship between crack depth and signal amplitude, a formula to calculate crack depth was proposed. The difference in curve shapes was used to distinguish crack propagation paths, which propagated horizontally to the weld and obliquely to the weld throat.


An, Yun-Kyu, H. Song, and H. Sohn, 2014, “Wireless Ultrasonic Wavefield Imaging via Laser for Hidden Damage Detection inside a Steel Box Girder Bridge,” Smart Materials & Structures, Vol. 23, No. 9, pp. 639–650.

Birring, Anmol S., 2008, “Ultrasonic Phased Arrays for Weld Testing,” Materials Evaluation, Vol. 66, No. 3, pp. 282–284.

Carodiskey, T.J, and P.A. Meyer, 1997, “Thickness Measurement in Materials of Unknown Acoustic Velocity,”, Vol. 2, No. 10, pp. 1–3.

Chakrapani, Sunil Kishore, M. Janardhan Padiyar, and K. Balasubramaniam, 2012, “Crack Detection in Full Size Cz-Silicon Wafers Using Lamb Wave Air Coupled Ultrasonic Testing (LAC-UT),” Journal of Nondestructive Evaluation, Vol. 31, No. 1, pp. 46–55.

Deng, Y., Y. Liu, D. Feng, and A.Q. Li, 2015, “Investigation of Fatigue Performance of Welded Details in Long-Span Steel Bridges using Long-Term Monitoring Strain Data,” Structural Control and Health Monitoring, Vol. 22, No. 11, pp. 1343–1358.

Erf, Robert (ed.), 1974, Holographic Nondestructive Testing, Elsevier (Academic Press), New York, NY.

Gang, T., and D.Z. Chi., 2007, “Novel Approach to Enhancement of Ultrasonic TOFD B-Scan Image for Measurement of Weld Crack,” Science and Technology of Welding & Joining, Vol. 12, No. 1, pp. 87–93.

Harri, Kristof, P. Guillaume, and S. Vanlanduit, 2008, “On-line Damage Detection on a Wing Panel Using Transmission of Multisine Ultrasonic Waves,” NDT & E International, Vol. 41, No. 4, pp. 312–317.

Jhang, Kyung-Young, 2009, “Nonlinear Ultrasonic Techniques for Nondestructive Assessment of Micro Damage in Material: A Review,” International Journal of Precision Engineering & Manufacturing, Vol. 10, No. 1, pp. 123–135.

Kenderian, S., 2002, “Advanced Ultrasonic Techniques to Determine the Structural Integrity of Rail Steel,” Ph.D. thesis, The John Hopkins University, Baltimore, MD.

People’s Republic of China, 2006, GB/T 700-2006, Carbon Structural Steels, National Standard of the People’s Republic of China, General Administration of Quality Supervision, Inspection and Quarantine of the People’s Republic of China.

Rao, B.P.C, B. Raj, T. Jayakumar, and P. Kalyanasundaram, 2002, “An Artificial Neural Network for Eddy Current Testing of Austenitic Stainless Steel Welds,” NDT & E International, Vol. 35, No. 6, pp. 393–398.

Ushakov, V.M., D.M. Davydov, and L.I. Domozhirov, 2011, “Detection and Measurement of Surface Cracks by the Ultrasonic Method for Evaluating Fatigue Failure of Metals,” Russian Journal of Nondestructive Testing, Vol. 47, No. 9, pp. 631–641.

Vladišauskas , A., L. Jakevičius, and J. Butkus, 2005, “The Use of Ultrasound for Determination of the Thickness of Glass Panes of Windows” Ultragarsas, Vol. 10, No. 7, pp.1291–1296.

Wohlschlögel, Markus, Gunter Gläßel, Daniela Sanchez, Andreas Schüßler, Alexander Dillenz, David Saal, and Peter Mayr, 2015, “Characterization of Nitinol Laser-Weld Joints by Nondestructive Testing,” Journal of Materials Engineering and Performance, Vol. 24, No. 12, pp. 4991–4996.

Xiao, Z.G., K. Yamada, S. Ya, and X.-L. Zhao, 2008, “Stress Analyses and Fatigue Evaluation of Rib-to-Deck Joints in Steel Orthotropic Decks,” International Journal of Fatigue, Vol. 30, No. 8, pp. 1387–1397.

Xie, Fa-Xiang, B.-H. Ji, Z.-Y. Yuanzhou, Z.-Q. Fu, and H.-B. Ge, 2016, “Ultrasonic Detecting Method and Repair Technology Based on Fatigue Crack Features in Steel Box Girder,” Journal of Performance of Constructed Facilities, Vol. 30, No. 2; doi: 10.1061/(ASCE)CF.1943-5509.0000725.

Zhang, Haibing, J. Sun, and H. Sun, 2016, “Experimental Research Based on Phased Array Ultrasonic Inspection Technology for Weld Joint Inspection of a Type of Aircraft Standing Bar,” Aeronautical Manufacturing Technology, Vol. 59, No. 22, pp. 89–91.

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