EngD, 2018 intake
University: Imperial College London
Sponsor: IHI Corporation
Background: BSc in Physics with a Diploma in Industrial Studies at Loughborough University, graduating in July 2017.
Development of Non-Destructive Ultrasonic Detection Methods of Macrozones within Titanium Alloys
The project aims to establish ultrasonic wave speed measurement methods in order to extract information about macrozones in aero-engine titanium compressor discs. Macrozones are relatively large regions of uniform crystallographic grain orientation which are believed to lead to a life debit in engine components through dwell fatigue leading to crack nucleation. Hence a non-destructive method using ultrasound waves to detect their presence in engineering components is eagerly sought.
The project aims to investigate ultrasonic normal and shear wave speed measurements in titanium alloys for this purpose. Because titanium grains are elastically anisotropic, reflecting their orientations, wave speed methods offer the potential to detect large regions of uniform crystallographic orientation by inferring their presence from measured wave speed changes.