Nucleation During Recrystallisation in Ti-SULC Steel |
| Journal |
Materials Science Forum (Volumes 467 - 470) |
| Volume |
Recrystallization and Grain Growth |
| Edited by |
B. Bacroix, J.H. Driver, R. Le Gall, Cl. Maurice, R. Penelle, H. Réglé and L. Tabourot |
| Pages |
93-98 |
| DOI |
10.4028/www.scientific.net/MSF.467-470.93 |
| Online since |
October, 2004 |
| Authors |
N.C.A. Seaton,
David J. Prior
|
| Keywords |
In Situ Experiment, Electron Backscattered Diffraction (EBSD), Nucleation, Recrystallization, Ti-SULC |
| Abstract |
This work is part of a PhD study which investigates mechanisms of nucleation during
recrystallisation in steels. A specially built SEM with EBSD and heating stage allows us to observe static recrystallisation in situ. Changes in samples of Ti-stabilised ultra low carbon steel heated to 550ºC are documented via still images, videos and automated EBSD maps. Recrystallisation begins rapidly but slows down within an hour. A temperature increase to 850ºC forces complete recrystallisation. EBSD mapping shows that the ‘new’ grains appear first on the boundaries of deformed {111} grains and have high angle misorientations with the deformed grains, although the new grains are also of {111} type. {111} type deformed grains are recrystallised first due to their higher stored energy relative to {001} grains. Mapping of a section through the sample along the rolling direction reveals intragranular shear bands. Future work will look at these sites in more detail to determine their role as sites for nucleation. |
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