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Enhancement of ultrasonic surface waves at wedge tips and angled defects

Research from the ERC Starting Independent Researcher Grant (202735, 2008-14) which explains the large enhancement of the ultrasonic signal in the near-field of angled surface-breaking defects, which can be used for characterisation of the angle of defect propagation. This work, along with earlier research, led to an invited talk at the International Congress on Ultrasonics 2011. We applied this effect for defect characterisation (reported in 10.1016/j.ndteint.2011.02.001), and implementation using EMATs (10.1016/j.ndteint.2012.03.002). It has led to collaboration with the National Nuclear Laboratory (Dr Gary Bolton, gary.bolton@nnl.co.uk) applying the method to real defects in samples removed from service or containing simulated defects.