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SUMMARY:Reactive Steels: - the making of calm welds - Professor H Bhadeshi
 a\, Department of Materials Science &amp\; Metallurgy
DTSTART:20081121T140000Z
DTEND:20081121T150000Z
UID:TALK13664@talks.cam.ac.uk
CONTACT:Ms Helen Gardner
DESCRIPTION:Some solid-state phase transformations in steels occur without
  diffusion. The change in crystal structure is instead achieved by a homog
 eneous deformation of the parent crystal into that of the product. It foll
 ows that the shape of the crystal changes during the course of transformat
 ion.\n\nThis shape deformation can in principle be exploited to cancel the
  residual stresses that develop when welds are made in constrained assembl
 ies. But the process requires control of the specific crystals that form\,
  and of the phase transformation temperatures. The underlying science will
  be explained together with specific examples of commercial applications.
LOCATION:Oatley Seminar Room\, Department of Engineering
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