Hossam Selim

TL;DR: A hybrid configuration where ultrasound is generated by impact of laser pulses, while the detection is done with conventional transducers is implemented for defect reconstruction in metallic elements and it is shown that it combines advantages of both photonic and ultrasonic devices, reducing the drawbacks of both methods.

TL;DR: The study demonstrates that the proposed method of wavelet transform ultrasonic imaging can be effectively applied to detect and size internal defects without any reference information, which represents a valuable outcome for various applications in the industry.

TL;DR: A hybrid laser–transducer system that combines remote, laser-generated ultrasound excitation and noncontact ultrasonic transducer detection, which allows access to scan areas on different object’s faces and defect details from different angles/perspectives and provides both qualitative and quantitative volumetric results that yield valuable information about defect location and size.

TL;DR: In this article, the detection of internal defects in a metallic sample is studied by means of the time-frequency analysis of the ultrasonic waves resulting from laser-induced thermal mechanism.

TL;DR: This work numerically investigates the diffraction management of longitudinal elastic waves propagating in a two-dimensional metallic phononic crystal and demonstrates that this structure acts as an “ultrasonic lens”, providing self-collimation or focusing effect at a certain distance from the crystal output.