PhD Studentship:Application of advanced surface processing technique to improve integrity of marine structures

Renewable Energy Marine Structures

Fabrication of a structure often affects the integrity as the structure is generally subjected to high temperature which results in creation of potential sites for damage initiation alongside adverse change in microstructural and metallurgical phases. Fusion welding is the most popular joining technique used for offshore structures. However, it also introduces locked in residual stresses which would act alongside the in-service applied stress and can accelerate failure. Understanding damage propagation and introduction of advanced metal processing technologies to retard damage propagation to improve structural integrity and thereby life of a component is challenging. In the present research programme, the research will focus on improving life of a component by introducing beneficial compressive residual stress state by advanced techniques such as laser peening and deep surface rolling. The student will be a part of an engineering doctorate cohort for four years which spans between Cranfield and Oxford University.

In the research, he/she will be mainly focussed on the design principles of integrity used for offshore structural alloys in the renewable energy sector that are currently being used and then exploit the capabilities of laser shock peening and deep surface rolling as metal processing tool to improve the life of a component by introducing tailored compressive residual stress state to improve damage tolerance of such safety critical structures. Such designed functionalities have the potential of reducing the overall life cycle cost of a component by improving structural efficiency.

During the doctoral thesis work, the student will be based in the Welding Engineering and Laser Processing Centre and be a part of a very vibrant PhD research student group working with different areas of novel joining, stress engineering, laser processing and additive manufacturing.

The candidate should have an engineering background with understanding on response of structural alloys when subjected to dynamic service conditions

On successful completion, the student will receive an Engineering Doctorate degree project within the Renewable Energy Marine Structures (REMS) Centre for Doctoral training (CDT) programme. REMS (Renewable Energy Marine Structures) is an EPSRC funded Centre for Doctoral Training set up to train fifty Engineering Doctorate and PhD students over an eight-year period. Ten new students will be admitted each year for five years starting from October 2014. The new students in October 2016 will be the third cohort in this programme. This is a collaborative partnership between Cranfield University and the University of Oxford. The REMS CDT conducts research across the full spectrum of Offshore & Marine Renewable Energy structures integrating deep specialist areas such as geotechnical engineering, the soil-structure interface, whole-system structural design & optimisation, design for manufacture, inspection maintenance & repair and structural integrity including fatigue & fracture mechanics in the marine environment.

If you are interested please email Dr Supriyo Ganguly at

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Midlands of England