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Non-Destructive Testing Techniques for Detecting Imperfections in Friction Stir Welds of Aluminium Alloys [PDF]

, 2011
Pedro Vilaça, Telmo G. Santos
core   +2 more sources

Non-destructive evaluation of depth of surface cracks using ultrasonic frequency analysis. [PDF]

Sensors (Basel), 2014
Her SC, Lin ST.
europepmc   +1 more source

Full-Matrix Imaging in Fourier Domain towards Ultrasonic Inspection with Wide-Angle Oblique Incidence for Welded Structures. [PDF]

Sensors (Basel)
Chen M, Xu X, Yang K, Wu H.
europepmc   +1 more source

Fracture Mechanics Analyses Of Static And Dynamic Failures Associated With Welding [PDF]

, 2015
Boothroyd, Colin Allistair
core  

Advancements in integrated robotic sensing: A European perspective. [PDF]

Open Res Eur
Mineo C.
europepmc   +1 more source

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A metrological approach to the time of flight diffraction method (ToFD)

Measurement, 2021
Abstract Introduction Non-Destructive Testing (NDT) is widely used in industry, especially in the evaluation of mechanical parts and structures for identifying defects, corrosion, flaws or imperfections. Time of flight diffraction (ToFD) is a method to assess discontinuities high within a workpiece or material, what is not easy to do with ...
R.C. Mayworm, A.V. Alvarenga, R.P.B. Costa-Felix   +2 more
openaire   +3 more sources

Shear-wave time of flight diffraction (S-TOFD) technique

NDT & E International, 2006
Ultrasonic time of flight diffraction (TOFD) for sizing defects is based on the time of flight of the diffracted echo that is generated when a longitudinal wave is incident on a crack tip. This technique has the limitation during near-surface inspection due to signal superposition.
G. Baskaran, Krishnan Balasubramaniam, C. Lakshmana Rao   +2 more
openaire   +3 more sources

Inspection Using Shear Wave Time of Flight Diffraction (S-TOFD) Technique

AIP Conference Proceedings, 2006
Ultrasonic Time of Flight Diffraction (TOFD) for sizing defects is based on the time of flight of the longitudinal diffracted echo(es) that is (arc) generated when a longitudinal wave is incident on a crack tip. TOFD technique so far has been commonly applied for the inspection of thick sections (>15 mm) and thickness below 5 mm from the scanning ...
C V Krishnamurthy, Krishnan Balasubramaniam   +1 more
openaire   +3 more sources

An alternative Ultrasonic Time of Flight Diffraction (TOFD) method

NDT & E International, 2018
Abstract In this work an alternative TOFD method is presented, capable to detect and size defects in the inspected material with good precision. It was shown that the diffraction used in this technique is the most relevant signal among the longitudinal backwall and the shear backwall echoes, compared to other TOFD methods.
F.W.T. Yeh, T. Lukomski, J. Haag, T. Clarke, T. Stepinski, T.R. Strohaecker   +5 more
openaire   +3 more sources

Reduction of Layered Dead Zone in Time-of-Flight Diffraction (TOFD) for Pipeline with Spectrum Analysis Method

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
openaire   +3 more sources