TWI has a range of core research activities in new friction welding technologies, with particular emphasis on lightweight alloys for aerospace (and other transport) applications, including joining of dissimilar alloys. Modelling plays a key role in optimisation of emerging processes, their application to new alloys, and the efficient targeting of expensive experimental work. This project, in collaboration with the Friction Processing Group at TWI, will apply finite element analysis to processes such as linear and rotary friction welding, and friction stir spot welding, particularly for titanium and high strength aluminium alloys. Possible detailed objectives of the modelling work include: (a) to improve fundamental understanding of the contact conditions at workpiece surfaces, and the flow of the metal during processing; (b) to relate the generation of heat directly to the hot deformation response of the alloys;(c) to couple the thermal and deformation histories to the evolution of microstructure, joint properties and residual stress. The PhD student will be expected to participate in manufacturing of sample components, and experimental testing and characterisation.