Developments towards higher resolution and the ability to detect small defects are bringing
a step-change in non-destructive testing. This paper presents a new method for increasing …

This paper investigates Rayleigh wave interaction with simulated, surface breaking cracks
using a finite element method, in which the scattered wave modes giving rise to the in-plane …

Abstract Electromagnetic Acoustic Transducers (EMATs) are a useful ultrasonic tool for non-
destructive evaluation in harsh environments due to their non-contact capabilities, and their …

To address the problem of low signal-to-noise ratio (SNR) of ultrasonic echo generated by
laser-electromagnetic acoustic transducer (EMAT) ultrasonic method in metal materials, a …

Several groups have reported an enhancement of the ultrasonic Rayleigh wave when
scanning close to a surface-breaking defect in a metal sample. This enhancement may be …

Laser generated ultrasound has been widely used for detecting cracks, surface and sub-
surface defects in many different materials. It provides a non-contact wideband excitation …

A pitch-catch low-frequency wideband Rayleigh wave EMAT system has been developed
that has been used for gauge corner cracking defect detection on the head of samples of rail …

We present details of a non-contacting technique that uses ultrasound to detect reliably
surface defects with depths that are significantly smaller than the average ultrasonic …

Enhancement of signal amplitudes from Rayleigh wave interaction at solid surface features
has been investigated when signals were detected by an in-plane electromagnetic acoustic …

The behaviour of sound waves interacting with wedges has attracted interest from
researchers in geophysics and non-destructive testing. We consider here the near-field …