The University of Sheffield
Department of Materials Science and Engineering

Prof C M Sellars

BMet PhD DMet HonCMechD FREng FNAE FIMMM
Emeritus Professor

Prof C M Sellars

Address:
Department of Materials Science and Engineering
Sir Robert Hadfield Building
Mappin Street, Sheffield, S1 3JD

Telephone: +44 (0) 114 222 5511
Fax: +44 (0) 114 222 5943

Email: c.m.sellars@sheffield.ac.uk

Mike Sellars joined the staff in 1963, after a period as a Research Engineer at Carnegie Institute of Technology, Pittsburgh. He helped to establish the Materials Processing (Quarrell) Laboratory with facilities for melting, casting, extrusion and rolling of alloys of closely controlled composition. He was Head of Department from 1991 to 1995 and Dean of the Faculty of Engineering from 1996 to 1999. He retired from the full-time academic staff in June 2001and is currently part-time Senior Research Fellow in IMMPETUS.

Research Interests

His current research interests centre on thermomechanical processing of metals and alloys, with emphasis on the microstructural changes produced and their effects on properties. Basic laboratory studies using plane strain compression testing, laboratory scale rolling, extrusion and forging have been used to provide data required to develop computer models of microstructural evolution and to validate the predictions of the models. Experimental studies have been carried out on a wide range of alloys including high strength low alloy (HSLA) steels, stainless steels, aluminium alloys and nickel based superalloys.

IMMPETUS
The Institute for Microstructural and Mechanical Process Engineering: The University of Sheffield was established in 1996 as a multidisciplinary research institute in collaboration with Professor John Beynon and Professor Derek Linkens (Dept of Automatic Control and Systems Engineering). With strong support from industry, and a major grant from EPSRC, IMMPETUS has about thirty ongoing research projects centred on modelling of industrial thermomechanical processing operations. Finite element modelling is used to determine local temperature, strain and strain rate histories during hot rolling and forging. The response of the materials to conditions of changing strain rate and temperature and to interrupted deformation typical of industrial working operations is of particular current interest. The kinetics of changes in dislocation density and subgrain size, and of strain induced precipitation, static recrystallisation and grain growth are being quantified to provide both basic understanding and inputs for computer modelling. A hybrid modelling methodology, which combines physically-based modelling with data-based modelling is being developed.

Selected Publications