Results 1 to 10 of about 5,213 (259)

Study of Residual Stress Using Phased Array Ultrasonics in Ti-6AL-4V Wire-Arc Additively Manufactured Components [PDF]

Sensors
This paper presents a study on residual stress measurement in wire-arc additively manufactured (WAAM) titanium samples using the non-destructive method of phased array ultrasonics. The contour method (CM) was used for the verification of the phased array
Joseph Walker, Brandon Mills, Yashar Javadi, Charles MacLeod, Yongle Sun, Pradeeptta Kumar Taraphdar, Bilal Ahmad, Sundar Gurumurthy, Jialuo Ding, Fiona Sillars   +9 more
doaj   +5 more sources

All-optically controlled phased-array for ultrasonics [PDF]

Nature Communications
The ability to dynamically shape ultrasound fields is critical for emerging applications in therapeutic ultrasound, particle manipulation and tissue engineering.
Rahul Goyal, Oscar Demeulenaere, Marc Fournelle, Athanasios G. Athanassiadis, Peer Fischer   +4 more
doaj   +5 more sources

Analysis of Flaw Detection Sensitivity of Phased Array Ultrasonics in Austenitic Steel Welds According to Inspection Conditions [PDF]

Sensors, 2021
The anisotropy and inhomogeneity exhibited by austenitic steel in welds poses a challenge to nondestructive testing employing ultrasonic waves, which is predominantly utilized for the inspection of welds in power plants.
YoungLae Kim, Sungjong Cho, Ik Keun Park
doaj   +2 more sources

Adapting the Time-Domain Synthetic Aperture Focusing Technique (T-SAFT) to Laser Ultrasonics for Imaging the Subsurface Defects [PDF]

Sensors, 2023
Traditional ultrasonic testing uses a single probe or phased array probe to investigate and visualize defects by adapting certain imaging algorithms. The time-domain synthetic aperture focusing technique (T-SAFT) is an imaging algorithm that employs a ...
Sundara Subramanian Karuppasamy, Che-Hua Yang   +1 more
doaj   +2 more sources

Nonlinear Ultrasonic Imaging for Porosity Evaluation [PDF]

Sensors, 2023
The influence of porosity on the mechanical behaviour of composite laminates represents a complex problem that involves many variables. Therefore, the evaluation of the type and volume content of porosity in a composite specimen is important for quality ...
Mario Emanuele De Simone, Salvatore Boccardi, Gian Piero Malfense Fierro, Michele Meo   +3 more
doaj   +2 more sources

Fast, Accurate, and Reliable Detection of Damage in Aircraft Composites by Advanced Synergistic Infrared Thermography and Phased Array Techniques

Applied Sciences, 2021
This paper presents an advanced methodology for the detection of damage in aircraft composite materials based on the sensor fusion of two image-based non-destructive evaluation techniques.
Janardhan Padiyar M., Luca Zanotti Fragonara, Ivan Petrunin, Joao Raposo, Antonios Tsourdos, Iain Gray, Spyridoyla Farmaki, Dimitrios Exarchos, Theodore E. Matikas, Konstantinos G. Dassios   +9 more
doaj   +1 more source

Nonlinear Ultrasonic Phased Array Imaging [PDF]

Physical Review Letters, 2014
This Letter reports a technique for the imaging of acoustic nonlinearity. By contrasting the energy of the diffuse field produced through the focusing of an ultrasonic array by delayed parallel element transmission with that produced by postprocessing of sequential transmission data, acoustic nonlinearity local to the focal point is measured. Spatially
Potter, J. N., Croxford, A. J., Wilcox, P. D.   +2 more
openaire   +3 more sources

Near-surface defect detection in additively manufactured components using laser induced phased arrays with surface acoustic wave crosstalk suppression

Materials & Design, 2023
In-process inspection of the additive manufacturing process requires a technique that can provide reliable measurements given the extreme operating environments, the small size of the defects and the cyclic melting and heating of the material, caused by ...
Geo Davis, Theodosia Stratoudaki, Peter Lukacs, Matthew W. Riding, Ahmed Al Fuwaires, Panagiotis Kamintzis, Don Pieris, Alan Keenan, Paul Wilcox, Gareth Pierce, Charles MacLeod, Stewart Williams   +11 more
doaj   +1 more source

Ultrasound array transmitter architecture with high timing resolution using embedded phase-locked loops [PDF]

, 2012
Coarse time quantization of delay profiles within ultrasound array systems can produce undesirable sidelobes in the radiated beam profile. The severity of these sidelobes is dependent upon the magnitude of phase quantization error - the deviation from ...
Cowell, DMJ, Freear, S, Raiton, B, Smith, PR, Vo Ky, C   +4 more
core   +1 more source

The high frequency flexural ultrasonic transducer for transmitting and receiving ultrasound in air [PDF]

, 2020
Flexural ultrasonic transducers are robust and low cost sensors that are typically used in industry for distance ranging, proximity sensing and flow measurement.
Dixon, Steve M., Feeney, Andrew, Kang, Lei   +2 more
core   +3 more sources