Results 181 to 190 of about 3,511 (220)

Mathematical morphology for TOFD image analysis and automatic crack detection

Ultrasonics, 2014
The aim of this work is to automate the interpretation of ultrasonic images during the non-destructive testing (NDT) technique called time-of-flight diffraction (TOFD) to aid in decision making. In this paper, the mathematical morphology approach is used to extract relevant pixels corresponding to the presence of a discontinuity, and a pattern ...
Thouraya, Merazi-Meksen, Malika, Boudraa, Bachir, Boudraa   +2 more
openaire   +2 more sources

Crack Measurement in Steel Plates Using TOFD Method

Journal of Performance of Constructed Facilities, 2000
In this study, the ultrasonic time of flight diffraction (TOFD) method to locate and size flaws in steel members was evaluated. This was done by measuring the location and depth of flaws implanted in steel plate specimens and of a fatigue crack in the flange of a full-scale steel plate girder.
William J. Zippel, José A. Pincheira, Glenn A. Washer   +2 more
openaire   +1 more source

Applicability of Referent Blocks for TOFD Methods

1997
TOFD is to be applied for flaw sizing and characterization whenever it is possible, having essential advantage over conventional UT methods and accuracy much higher than the other UT methods. The primary application starting point is to demonstrate the capability of chosen UT system to be adjusted for TOFD in reproducible way.
Leljak, Irena, Krstelj, Vjera
openaire   +1 more source

TIME OF FLIGHT DIFFRACTION (ToFD) WITH THz RADIATION—AN ALTERNATIVE TO THE ULTRA SOUND—ToFD TECHNIQE FOR NON-METALLIC MATERIALS

AIP Conference Proceedings, 2011
A time domain spectrometer in the range of 0.5–2 THz was used for time of flight (ToF) measurements of THz pulses for imperfection detection in non metallic materials. The measurements were performed in comparison to the established ultra sound pulse echo (PE) and time of flight diffraction (ToFD) technique.
U. Ewert, J. Beckmann, L. S. von Chrzanowski, G. Brekow, D. Brackrock, Donald O. Thompson, Dale E. Chimenti   +6 more
openaire   +1 more source

Upotreba TOFD tehnike pri ispitivanju rotora s provrtom

1999
U radu je prikazana metoda ispitivanja kojim su autori ispitali turbinski rotor s provrtom suvremenom TOFD tehnikom.
Dukić, Ines, Dukić, Predrag
openaire   +2 more sources

A Numerical Model for Ultrasonic Time-of-Flight Diffraction (TOFD) Testing of Austenitic Welds

Russian journal of nondestructive testing, 2023
Seyyed H Hosseini, F. Honarvar
semanticscholar   +1 more source

L51815 The Development of a TOFD Image Reference Collection

1997
The Time Of Flight Diffraction (TOFD) Technique is rapidly gaining importance as a reliable NDT technique for weld inspection, capable of both detection and sizing of defects. The acquisition of TOFD inspection data is fast and straightforward; the crucial step in inspection reliability is therefore its interpretation. A reliable interpretation of TOFD
openaire   +1 more source

A Study on Deep Learning-based Defect Analysis Using TOFD Signal on CRDM Nozzle

Journal of the Korean Society for Nondestructive Testing, 2023
Soomin Lee, Junpil Park, Hunhee Kim, Jaeseok Park, Jaesun Lee   +4 more
semanticscholar   +1 more source

TOFD IMAGING: Ultrasonic TOFD flaw sizing and imaging in thin plates using embedded signal identification technique (ESIT)

Insight - Non-Destructive Testing and Condition Monitoring, 2004
G Baskaran, Krishnan Balasubramaniam, C V Krishnamurthy, C Lakshmana Rao   +3 more
openaire   +1 more source

Comparative Evaluation of Defect Sizing Accuracy for Internal Defects in Steel Multi-Pass Welded Joint by PAUT and TOFD

The Proceedings of the Materials and Mechanics Conference, 2023
Kaito Yonekura, Shigetaka Okano, Masahito Mochizuki   +2 more
semanticscholar   +1 more source