Article Periodicals » Materials Evaluation » Article
An Ultrasonic Time of Flight Diffraction Technique for Characterization of Surface-Breaking Inclined Cracks

This paper presents the development of a testing technique for measuring the angle of inclination and depth of surface-breaking inclined cracks in simple geometry components using a manual ultrasonic time of flight diffraction system. The testing technique in this work can be useful in risk based test planning for simple geometry components such as pipelines and boiler headers.

References
Baby S., T. Balasubramanian and R.J. Pardikar, “Estimation of the Height of Surface-Breaking Cracks Using Ultrasonic Timing Methods,” Insight, Vol. 44, 2002, pp. 679–683. Baby, S., T. Balasubramanian, R.J. Pardikar, M. Palaniappan and R. Subbaratnam, “Time-of-Flight Diffraction (TOFD) Technique for Accurate Sizing of Surface-Breaking Cracks,” Insight, Vol. 45, 2003a, pp. 426–430. Baby S., T. Balasubramanian, R.J. Pardikar, M. Palaniappan and R. Subbaratnam, “Time-of-Flight Diffraction (TOFD) Technique for Accurate Sizing of Cracks Embedded in Sub-cladding,” Insight, Vol. 45, 2003b, pp. 600–604. Baskaran, G., “Studies on Ultrasonic Time of Flight Diffraction Imaging of Defects in Thin Sections,” Ph.D. thesis, Chennai, India, Indian Institute of Madras, 2005. Broek, D., The Practical Use of Fracture Mechanics, Dordrecht, The Netherlands, Kluwer Academic Publishers, 1989. BSI, BS 7706: Guide to Calibration and Setting-up of the Ultrasonic Time of Flight Diffraction (TOFD) Technique for the Detection, Location and Sizing of Flaws, London, British Standards Institution, 1993. Charlesworth, J.P. and J.A.G. Temple, Engineering Applications of Ultrasonic Time of Flight Diffraction, second edition, England, Research Studies Press, 2001. Deutsches Institut für Normung, ENV 583-6: Non-destructive Testing –Ultrasonic Examination — Part 6: Time of Flight Diffraction Technique as a Method for Detection and Sizing of Discontinuities, Berlin, Deutsches Institut für Normung, 2000. Nath, S.K., K. Balasubramaniam, C.V. Krishnamurthy and B.H. Narayana, “Sizing of Surface-Breaking Cracks in Complex Geometry Components by Ultrasonic Time-of-Flight Diffraction (TOFD) Technique,” Insight, Vol. 49, 2007, pp. 200–206. Nath, S.K., K. Balasubramaniam, C.V. Krishnamurthy and B.H. Narayana, “Reliability Analysis of Manual Ultrasonic Time of Flight Diffraction (TOFD) for Characterization of Inclined Cracks,” Materials Evaluation, 2009a (forthcoming). Nath, S.K., K. Balasubramaniam, C.V. Krishnamurthy and B.H. Narayana, “Detection and Sizing of Defects in Complex Geometry Weld by Ultrasonic Time of Flight Diffraction (TOFD) Inspection,” ASME Journal of Pressure Vessel Technology, 2009b (forthcoming). Ogilvy, J.A. and J.A.G. Temple, “Diffraction of Elastic Waves by Cracks: Application to Time of Flight Inspection,” Ultrasonics, Vol. 7, 1983, pp. 259–269. Quimby, R., “Practical Limitations of TOFD on Power Station Main Steam Pipe Work,” Insight, Vol. 48, 2006, pp. 559–563. Tekin, B., Gur C. Hakan and Ankara O. Alpay, “Investigation of Fatigue and Creep Damage in Steam Boiler Pipes by Ultrasonic Testing,” Insight, Vol. 39, 1997, pp. 626–629.
Metrics
Usage Shares
Total Views
57 Page Views
Total Shares
0 Tweets
57
0 PDF Downloads
0
0 Facebook Shares
Total Usage
57