This thesis describes the development of a new technique to solve
an important industrial inspection requirement for a high-value
jet-engine component. The work - and the story told in the thesis -
stretches all the way from the fundamentals of wave propagation in
anisotropic material and ultrasonic array imaging through to device
production and site trials. The book includes a description of a
new method to determine crystallographic orientation from 2D
ultrasonic array data. Another new method is described that enables
volumetric images of an anisotropic material to be generated from
2D ultrasonic array data, based on measured crystallographic
orientation. After extensive modeling, a suitable 2D array and
deployment fixtures were manufactured and tested on in situ turbine
blades in real engines. The final site trial indicated an order of
magnitude improvement over the best existing technique in the
detectability of a certain type of root cracking. The Development
of a 2D Ultrasonic Array Inspection for Single Crystal Turbine
Blades should be an inspiration for those starting out on doctoral
degrees as it shows the complete development cycle from basic
science to industrial usage.
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