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SUMMARY:Following Meso/Microstructural Evolution in Three Dimensions by X-
 ray Microtomography - Prof. Phil J. Withers\, The School of Materials\, Un
 iversity of Manchester
DTSTART:20071130T111500Z
DTEND:20071130T121500Z
UID:TALK9350@talks.cam.ac.uk
CONTACT:7110
DESCRIPTION:Penetrating beams of high energy X-rays can be used to produce
  3D images of meso/micro-structure. Since this can be done non destructive
 ly it is possible to follow the evolution of structure as a consequence of
  exposure to corrosive environments\, temperature\, radiation or applied l
 oads\, etc. In this talk I will present examples of situations where we ha
 ve been able to improve our understanding of failure mechanisms and develo
 p better micromechanical models including: \n\n• The propagation of crac
 ks and crack bridging in continuous metal matrix composites \n\n• Tracki
 ng the movement of powder during powder processing to form a green state a
 nd finally a fully dense consolidated product \n\n• The evolution of str
 ess corrosion cracks \n\n• The crushing of cellular structures such as b
 one \n\n• The simulated radio-degradation of nuclear graphite \n\n
LOCATION:Gordon Lab Seminar Room\, Austin Building\, Dept. of Materials Sc
 ience &amp\; Metallurgy
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