52nd Hatfield Memorial Lecture
Tuesday, 7 December 2004 at 6.45pm

"Large Chunks of Extremely Strong Steel" to be delivered by
Professor Harry Bhadeshia FRS, FREng
Professor of Physical Metallurgy, The University of Cambridge

at the Convocation Hall, Octagon Centre, Western Bank, Sheffield, to be followed by a buffet supper in University House.

Tickets from:
Gail Street
The Ceremonies Office
The University of Sheffield
Octagon Centre
Western Bank
S10 2TN


"Most new materials are introduced by selectively comparing their properties against those of steels. Wouldn't it be nice to have a strong alloy of iron, which can be used for making large artefacts, without the need for mechanical processing or rapid cooling to reach the desired properties?

In his lecture, Professor Bhadeshia will describe a remarkably beautiful microstructure consisting of slender crystals of ferrite, whose controlling scale compares well with that of carbon nanotubes. The crystals are generated by the partial transformation of austenite, resulting in an extraordinary combination of strength, hardness and toughness. All this in bulk steel without the use of expensive alloying elements. The scientific theory which led to this discovery is revealing in itself, as are the results of characterisation experiments in which observations have been made of atoms and clusters of atoms."

Date Posted: 27 October 2004

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