Results 71 to 80 of about 115 (104)
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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
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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 ...
Ali Habibpour-Ledari, Farhang Honarvar
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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 ...
Ali Habibpour-Ledari, Farhang Honarvar
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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
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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
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NDT & 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.
S.K. Nath +3 more
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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.
S.K. Nath +3 more
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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.
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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 +6 more
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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 +6 more
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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.
S K Nath +3 more
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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.
S K Nath +3 more
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Volume 5: High Pressure Technology; Nondestructive Evaluation Division; Student Paper Competition, 2009
In the nuclear industry, and in particular, regarding large steel components including the nuclear steam supply system, weld integrity must be assessed and confirmed during the fabrication process, for the initial field-welds and periodically during in-service follow-up of some critical assembly welds.
Alexandre Bleuze +6 more
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In the nuclear industry, and in particular, regarding large steel components including the nuclear steam supply system, weld integrity must be assessed and confirmed during the fabrication process, for the initial field-welds and periodically during in-service follow-up of some critical assembly welds.
Alexandre Bleuze +6 more
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2012
This paper describes research towards the development of a robotic system for automated welded joint testing. The tests are often carried out manually by skilled personnel. Automating the inspection process would reduce errors and associated costs. The system proposed in this paper is based on a mobile robot platform and is designed to carry ultrasonic
Barbara Siemia̧tkowska +5 more
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This paper describes research towards the development of a robotic system for automated welded joint testing. The tests are often carried out manually by skilled personnel. Automating the inspection process would reduce errors and associated costs. The system proposed in this paper is based on a mobile robot platform and is designed to carry ultrasonic
Barbara Siemia̧tkowska +5 more
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A Numerical Model for Ultrasonic Time-of-Flight Diffraction (TOFD) Testing of Austenitic Welds
Russian Journal of Nondestructive Testing, 2023Seyyed H Hosseini, Farhang Honarvar
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