Defect detection of partially complete SAW and TIG welds using the ultrasonic time-of-flight diffraction method

1998 ◽  
Author(s):  
Shaun W. Lawson ◽  
Gary R. Bonser
Keyword(s):  
Defect Detection ◽  
Time Of Flight ◽  
Diffraction Method ◽  
Time Of Flight Diffraction ◽  
Ultrasonic Time

scholarly journals Tangential Homology for Defect Detection in the Time of Flight Diffraction Method (TOFD)

PAMM ◽  
2016 ◽  
Vol 16 (1) ◽  
pp. 619-620
Author(s):  
Jose F. Cuenca ◽  
Armin Iske ◽  
Patrick A. Labud ◽  
Oliver Nemitz
Keyword(s):  
Defect Detection ◽  
Time Of Flight ◽  
Diffraction Method ◽  
Time Of Flight Diffraction

Ray Based Model for the Ultrasonic Time-of-Flight Diffraction Simulation of Thin Walled Structure Inspection

2005 ◽  
Vol 127 (3) ◽  
pp. 262-268 ◽  
Author(s):  
G. Baskaran ◽  
K. Balasubramaniam ◽  
C. V. Krishnamurthy ◽  
C. Lakshmana Rao
Keyword(s):  
Time Of Flight ◽  
Diffraction Theory ◽  
Pressure Vessels ◽  
Experimental Results ◽  
Signal Identification ◽  
Time Of Flight Diffraction ◽  
Aerospace Applications ◽  
Ultrasonic Time ◽  
Probe Frequency ◽  
Thin Walled

It is necessary to size the cracklike defects accurately in order to extend the life of thin-walled (<10mm) components (such as pressure vessels) particularly for aerospace applications. This paper discusses the successful application of ray techniques to simulate the ultrasonic time-of-flight diffraction experiments for platelike structures. For the simulation, the diffraction coefficients are computed using the geometric diffraction theory. The A and B scans are simulated in near real time and the different experimental parameters can be interactively controlled due to the computational efficiency of the ray technique. The simulated results are applied to (1) defect signal identification for vertical defects, (2) inspection of inclined defects, and (3) study the effect of pulse width or probe frequency on experimental results. The simulated results are compared with laboratory scale experimental results.

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