Professor John Humphreys

John Humphreys obtained his MA and DPhil in Metallurgy at Oxford, where he also carried out postdoctoral research. He then moved to London, where he worked at Imperial College, as a lecturer, reader and professor until moving to Manchester in 1990.

His research is mainly concerned with the microstructures and textures developed during the deformation and annealing of aluminium and other alloys. Major areas of interest include the development of high resolution Electron Backscatter Diffraction (EBSD) and its application to the quantification of microstructures, the development of inhomogeneous microstructures during deformation, mechanisms of recrystallization and the modelling of microstructural evolution.

He maintains a web site, http://www.recrystallization.info which contains information on recrystallization and a collection of videoclips of SEM, TEM and optical microscopy experiments on deformation and annealing.

• Mechanisms of dynamic recrystallization in copper alloys
• Microstructural evolution in metals
• Inhomogeneous deformation of metals
• Deformation induced grain boundary migration
• Abnormal grain growth
• Deformation of beta-titanium alloys
• Quantification of microstructures by EBSD
• In-situ SEM deformation and annealing
• Continuous recrystallization

• F.J. Humphreys. "Grain and subgrain characterisation by electron backscatter diffraction". J. Mats. Sci. 36, 3833-54, (2001).
• A. Gholinia, F.J. Humphreys and P.B. Prangnell. "Production of ultra-fine grain microstructures in Al-Mg alloys by conventional rolling". Acta Mater. 50, 4461-4476, (2002).
• P.J. Hurley and F.J. Humphreys "The Application of EBSD to the Study of Substructural Development in a Cold Rolled Single-Phase aluminium alloy". Acta Mater. 51, 1087-1102 (2003).
• P.J. Hurley, P. S. Bate and F.J. Humphreys. "An objective study of substructural boundary alignment in aluminium". Acta Mater. 51, 4737-4750, (2003).
• F. J. Humphreys, M. J. Jones, and M. Somerday. "The Effect of Transition Element Dispersoids on The Recrystallization of Aluminium". Proc. Int. conf. Thermomechanical Processing: Mechanics, Microstructure and Control. University of Sheffield, Eds. Palmiere, Mahfouf and Pinna. BBR Solutions, p46, (2003).
• F.J. Humphreys & M. Hatherly "Recrystallization and Related Annealing Phenomena", Elsevier, Oxford, (2004). Second Edition.
• H. Jazaeri and F.J. Humphreys. "The Transition from Discontinuous to Continuous Recrystallization in Some Aluminium Alloys: I - The Deformed State." Acta Mat. 52, 3239-3250, (2004)
• H. Jazaeri and F.J. Humphreys. "The Transition from Discontinuous to Continuous Recrystallization in Some Aluminium Alloys: II - The Annealing Behaviour." Acta Mat. 52, 3251-3262, (2004).