Investigation of Sound Field with Water Immersion TOFD Method Basing on Electron Beam Welding

Abstract:

The time and flight diffraction (TOFD) technique has be more and more applied as a well-developed ultrasonic non-destructive testing (NDT) technique in a increasing number of industrial areas such as aeronautics and mechanical industries, therefore, the TOFD technique can be also used to investigate the sound field characteristic curve of artificial defects in welding. The investigations are performed in 2-layered medium (water-steel) with using the finite difference numerical simulation software Wave2000. The receiver group is consisted of several receivers which are immersed in water and have the same frequency, the receivers are placed at the opposite positions by changing regular angle.The results show that amplitude of diffraction wave change along different receiving orientation greatly, if the normal to the vertical direction is set to 0 degree, then the direction of 20° can receive the largest amplitude of diffraction wave. At last, the characteristic curve of diffraction wave is given in this paper.

• Periodical: Advanced Materials Research (Volume 904)
• Pages: 296-301
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.904.296
• Online since: March 2014
• Authors: Jing Zhai*, Chao Lu, Cheng Long Yu
• Keywords: Electron Beam Welding, Numerical Simulation, Sound Field, TOFD

References

[1] Martin Spies, Hans Rieder, Volker Schmitz. Synthetic Aperture Focusing and Time-of-Flight Diffraction Ultrasonic Imaging—Past and Present. J Nondestruct Eval (2012) 31: 310–323.

DOI: 10.1007/s10921-012-0150-z

[2] LI Yan. Time-of-flight diffraction technique for detecting and sizing of discontinuities [J]. NDT, 2004, 26(1): 47-53.

[3] PENG Ying-qiu, LI Jian, QUAN Yi-ping. Analysis on acoustic field characteristic and application in ultrasonic testing [J]. NDT, 2003, 25(12): 613-615.

[4] FAN Li-mei, SHI Yi-wei, REN Ji-lin. Application of Multizone Ultrasonic Inspection for Great Thickness EBW[J]. Journal of Materials Engineering, 2009, (6): 76-80.

[5] SHENG Zhaoyang GANG Tie CHI Dazhao . Segmentation of Ultrasonic TOFD Testing Image Based on Watershed Method [J]. Journal of Mechanical Engineering, 2011, 47(8): 35-40.

DOI: 10.3901/jme.2011.08.035

[6] Angam Praveen, K. Vijayarekha, Saju T. Signal quality enhancement using higher order wavelets for ultrasonic TOFD signals from austenitic stainless steel welds [J]. Ultrasonics 53 (2013) 1288–1292.

DOI: 10.1016/j.ultras.2013.03.013

[7] S.K. Nath, Krishnan Balasubramaniam, C.V. Krishnamurthy. Reliability assessment of manual ultrasonic time of flight diffraction (TOFD) inspection for complex geometry components [J]. NDT & E International, Volume 43, Issue 2, March 2010, Pages 152-162.

DOI: 10.1016/j.ndteint.2009.10.007

[8] Angam Praveen, K. Vijayarekha, Saju T. Abraham. Signal quality enhancement using higher order wavelets for ultrasonic TOFD signals from austenitic stainless steel welds [J]. Ultrasonics, Volume 53, Issue 7, September 2013, Pages 1288-1292.

DOI: 10.1016/j.ultras.2013.03.013

[9] Hanxin Chen, Ming J. Zuo, Xiaodong Wang. An adaptive Morlet wavelet filter for time- of-flight estimation in ultrasonic damage assessment [J]. Measurement, Volume 43, Issue 4, May 2010, Pages 570-585.

DOI: 10.1016/j.measurement.2010.01.001

[10] L. Satyanarayan, C. Sridhar, C.V. Krishnamurthy. Simulation of ultrasonic phased array technique for imaging and sizing of defects using longitudinal waves [J]. International Journal of Pressure Vessels and Piping, Volume 84, Issue 12, December 2007, Pages 716-729.

DOI: 10.1016/j.ijpvp.2007.08.002

[11] Seyedali Sadeghi, Mehdi Ahmadi Najafabadi, Yashar Javadi. Using ultrasonic waves and finite element method to evaluate through-thickness residual stresses distribution in the friction stir elding of aluminum plates[J]. Materials & Design, 2013, 12(52) : 870-880.

DOI: 10.1016/j.matdes.2013.06.032

[12] Yalin Yu, Jinrui Ye, Yang Wang. A mesoscale ultrasonic attenuation finite element model of composites with random-distributed voids [J]. Composites Science and Technology, 2013, 12(89): 44-51.

DOI: 10.1016/j.compscitech.2013.09.006