Stress corrosion cracking detection using non-contact ultrasonic techniques

In this work a method is presented for detecting and locating stress corrosion cracking (SCC) in stainless steel pipe samples. The method combines laser generation and either laser or electromagnetic acoustic transducer (EMAT) detection, scanning the generation point across the sample surface. Using laser-generated ultrasonic waves that interact with the cracks, and performing time–frequency analysis techniques to examine changes in the generated wavemodes, surface plots that clearly resolve the spatial extent and geometric alignment of the cracks are created and presented here. The method is demonstrated using components removed from service after exhibiting SCC.

[1]  M. H. Rosli,et al.  In-plane and out-of-plane measurements of Rayleigh waves using EMATs for characterising surface cracks , 2012 .

[2]  L. Drain,et al.  Laser Ultrasonics Techniques and Applications , 1990 .

[3]  K. Sieradzki,et al.  Stress-corrosion cracking , 1987 .

[4]  D. Bray.  Nondestructive Evaluation , 2018 .

[5]  Rachel S. Edwards,et al.  Non-linear enhancement of laser generated ultrasonic Rayleigh waves by cracks , 2008 .

[6]  R. Edwards,et al.  Depth gauging of defects using low frequency wideband Rayleigh waves. , 2006, Ultrasonics.

[7]  Gui Yun Tian,et al.  Feature extraction and selection for defect classification of pulsed eddy current NDT , 2008 .

[8]  W. E. Moerner,et al.  Homodyne detection of ultrasonic surface displacements using two-wave mixing in photorefractive polymers , 1999 .

[9]  Rachel S. Edwards,et al.  Scanning laser source Lamb wave enhancements for defect characterisation , 2014 .

[10]  J. Rose.  Ultrasonic Waves in Solid Media , 1999 .

[11]  James L. Blackshire,et al.  Near-field ultrasonic scattering from surface-breaking cracks , 2002 .

[12]  Phil T. Cattani,et al.  Identifying surface angled cracks on aluminium bar using EMATS and automated computer system , 2010 .

[13]  Baldev Raj,et al.  Use of eddy current testing method in detection and evaluation of sensitisation and intergranular corrosion in austenitic stainless steels , 2006 .

[14]  B. Dutton,et al.  Laser generation of lamb waves for defect detection: Experimental methods and finite element modeling , 2012, IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control.

[15]  Philip J. Withers,et al.  X-ray microtomographic observation of intergranular stress corrosion cracking in sensitised austenitic stainless steel , 2006 .

[16]  Lamb wave near field enhancements for surface breaking defects in plates , 2012 .

[17]  Steve Dixon,et al.  WIDEBAND ULTRASONIC TIME OF FLIGHT DIFFRACTION COMBINING B-SCANS AND CROSS-SECTIONAL IMAGING , 2009 .

[18]  Peter J. Shull,et al.  Nondestructive Evaluation: Theory, Techniques, and Applications , 2002 .

[19]  Peter B. Nagy,et al.  Enhanced ultrasonic detection of fatigue cracks by laser-induced crack closure , 1998 .

[20]  Brian Larson.  Study of the Factors Affecting the Sensitivity of Liquid Penetrant Inspections: Review of Literature Published from 1970 to 1998 , 2002 .

[21]  Rachel S. Edwards,et al.  Ultrasonic surface wave propagation and interaction with surface defects on rail track head , 2007 .

[22]  S. Casalta,et al.  Digital Image Analysis of X-Ray and Neutron Radiography for the Inspection and the Monitoring of Nuclear Materials. , 2003 .

[23]  M. H. Rosli,et al.  Non-contact ultrasonic detection of angled surface defects , 2011 .

[24]  P A Petcher,et al.  Parabola detection using matched filtering for ultrasound B-scans. , 2012, Ultrasonics.

[25]  J Jarzynski,et al.  Time-frequency representations of Lamb waves. , 2001, The Journal of the Acoustical Society of America.

[26]  S B Palmer,et al.  High accuracy non-contact ultrasonic thickness gauging of aluminium sheet using electromagnetic acoustic transducers. , 2001, Ultrasonics.

[27]  Jan Drewes Achenbach,et al.  Laser ultrasonic detection of surface breaking discontinuities: Scanning laser source technique , 2000 .

[28]  S Dixon,et al.  Detection of cracks in metal sheets using pulsed laser generated ultrasound and EMAT detection. , 2011, Ultrasonics.

[29]  Stuart B. Palmer,et al.  Industrially viable non-contact ultrasound , 2003 .

[30]  Irene Arias,et al.  A model for the ultrasonic detection of surface-breaking cracks by the scanning laser source technique , 2004 .

[31]  Noritaka Yusa,et al.  Eddy current inspection of closed fatigue and stress corrosion cracks , 2007 .

[32]  Ningqun Guo,et al.  Rayleigh wave interaction with surface-breaking cracks , 2007 .

[33]  D. Thompson,et al.  Review of Progress in Quantitative Nondestructive Evaluation , 1982 .

[34]  K. Kawashima,et al.  Quantitative Calculation and Measurement of Longitudinal and Transverse Ultrasonic Wave Pulses in Solid , 1984, IEEE Transactions on Sonics and Ultrasonics.

[35]  Alan Turnbull,et al.  Novel images of the evolution of stress corrosion cracks from corrosion pits , 2011 .

[36]  Rachel S. Edwards,et al.  Near Field Enhancements from Angled Surface Defects; A Comparison of Scanning Laser Source and Scanning Laser Detection Techniques , 2011 .