John Humphreys is a Physical Metallurgist, who has worked for many years on the deformation, texture, annealing and characterisation of metals, with a particular interest in aluminium alloys. He is actively involved in refining and applying the technique of Electron Backscatter Diffraction (EBSD) to microstructural characterisation.

Current activities include the three dimensional nature of deformation microstructures, the development and properties on sub-micron-grained metals, the interaction of phase transformations and thermomechanical processing on the microstructures of aluminium alloys, the modelling of microstructures and textures during deformation, forming and annealing, hot deformation, dynamic recovery and dynamic recrystallization and superplasticity.