Results 71 to 80 of about 137 (111)
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Journal of Nondestructive Evaluation, 2018
Ultrasonic time-of-flight diffraction (ToFD) technique has high accuracy in locating and sizing discontinuities. The primary reason for this accuracy is the use of time instead of amplitude for measurement of the depth and size of discontinuities. Despite the many advantages of ToFD, it suffers from a number of shortcomings, the most notable one being ...
Farhang Honarvar, Honarvar Farhang
exaly +2 more sources
Ultrasonic time-of-flight diffraction (ToFD) technique has high accuracy in locating and sizing discontinuities. The primary reason for this accuracy is the use of time instead of amplitude for measurement of the depth and size of discontinuities. Despite the many advantages of ToFD, it suffers from a number of shortcomings, the most notable one being ...
Farhang Honarvar, Honarvar Farhang
exaly +2 more sources
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, Ewert U
exaly +2 more sources
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, Ewert U
exaly +2 more sources
Ultrasonic Inspection Using Time-of-Flight Diffraction (TOFD)
Springer Series on Naval Architecture, Marine Engineering, Shipbuilding and ShippingRichard Rossi Ciampolini +2 more
exaly +2 more sources
Reducing Dead Zone in Ultrasonic Time-of-Flight Diffraction (TOFD): A Review
Russian Journal of Nondestructive TestingShijie Jin, Zhongbing Luo
exaly +2 more sources
NDT and E International, 2010
Experimental probability of detection (POD) and probability of sizing (POS) curves are developed for the detection and sizing of surface-breaking cracks in components having complex geometry. A manual ultrasonic time of flight diffraction (TOFD) inspection system has been used to develop these POD and POS curves.
Krishnan Balasubramaniam
exaly +2 more sources
Experimental probability of detection (POD) and probability of sizing (POS) curves are developed for the detection and sizing of surface-breaking cracks in components having complex geometry. A manual ultrasonic time of flight diffraction (TOFD) inspection system has been used to develop these POD and POS curves.
Krishnan Balasubramaniam
exaly +2 more sources
Journal of Nondestructive Evaluation, 2021
When ultrasonic time-of-flight diffraction (TOFD) B-scan is implemented along the circumferential direction of pipeline, the ray path of direct longitudinal wave (DLW) is not parallel to the curved pipeline surface, inducing the layered dead zone.
S. J. Jin, B. Zhang, X. Sun, L. Lin
exaly +2 more sources
When ultrasonic time-of-flight diffraction (TOFD) B-scan is implemented along the circumferential direction of pipeline, the ray path of direct longitudinal wave (DLW) is not parallel to the curved pipeline surface, inducing the layered dead zone.
S. J. Jin, B. Zhang, X. Sun, L. Lin
exaly +2 more sources
Time-of-flight diffraction (TOFD) technique for accurate sizing of surface-breaking cracks
Insight: Non-Destructive Testing and Condition Monitoring, 2003This paper deals with an experimental study for evaluation of TOFD technique for determination of size of the surface breaking cracks. The study was confined to simulated cracks. The steel test blocks used for the study contained 0.5mm wide vertical slits of various heights ranging from 0.91mm to 30mm. Another set of blocks contained inclined slits (10°
Sony Baby +4 more
exaly +2 more sources
Welding in the World, 2005
The ultrasonic time-of-flight-diffraction (TOFD) technique has been used mainly to detect and precisely size flaws in welded butt joints. But industrial applicability of the conventional TOFD technique is restricted due to inspection targets’shape complexity and ultrasonic noise.
A. Nishikawa +4 more
openaire +1 more source
The ultrasonic time-of-flight-diffraction (TOFD) technique has been used mainly to detect and precisely size flaws in welded butt joints. But industrial applicability of the conventional TOFD technique is restricted due to inspection targets’shape complexity and ultrasonic noise.
A. Nishikawa +4 more
openaire +1 more source
Insight: Non-Destructive Testing and Condition Monitoring, 2007
Sizing a surface-breaking crack in a complex geometry component, for example a steam turbine's solid rotor shaft, is a challenging inspection task. This paper deals with experimental work for the evaluation of the Time-of-Flight Diffraction (TOFD) technique for sizing of surface-breaking cracks in such a complex geometry component.
Krishnan Balasubramaniam +2 more
exaly +2 more sources
Sizing a surface-breaking crack in a complex geometry component, for example a steam turbine's solid rotor shaft, is a challenging inspection task. This paper deals with experimental work for the evaluation of the Time-of-Flight Diffraction (TOFD) technique for sizing of surface-breaking cracks in such a complex geometry component.
Krishnan Balasubramaniam +2 more
exaly +2 more sources
Time-of-flight diffraction (TOFD) technique for accurate sizing of cracks embedded in sub-cladding
Insight - Non-Destructive Testing and Condition Monitoring, 2003This paper deals with an experimental study for evaluation of the TOFD technique for determination of size of cracks embedded in sub-cladding. It extends the results presented in the previous papers ( 1 , 2 ) . The studywas confined to simulated cracks (machined slits) underneath the cladding.
Sony Baby +4 more
openaire +1 more source