EngD student, 2011 intake
Research: Advanced Eddy-Current Array (ECA) Technology for Sub-millimetre Defect Detection in Aerospace Superalloys
Sponsoring company: Rolls-Royce plc (Defence Aerospace)
Undergraduate Masters in Physics, University of Warwick, June 2011. The final year project was my first introduction to NDE and was aimed at measuring ultrasonic Rayleigh wave diffraction patterns using electromagnetic acoustic transducers (EMATs) in order to determine the dimensions of a feature.
My Research involves the investigation and development of advanced eddy-current (EC) methods for improving the detectability of sub-millimetre defects in difficult to inspect aerospace superalloys such as Titanium 6Al-4V (Ti 6-4).
My work has led to detection, characterisation and exploitation of a phenomenon dubbed near electrical resonance signal enhancement (NERSE) in order to dramatically boost the signal-to-noise ratio of sub-millimetre defects . The phenomenon works by recognising that defects cause a shift in the electrical resonant frequency of a probe leading to greater changes between signals above a defect and on undamaged material. This causes the maximum defect signal to occur at a different frequency from the maximum background noise, resulting is a higher signal-to-noise ratio at the maximum defect signal frequency.
Methods of exploiting this phenomenon are being developed for use in prototype arrays in order to reduce the chances of small defects being undetected.