Observations of grain boundary protrusions in static recrystallization of high-purity bcc metals

Protrusions at migrating high-angle grain boundaries were observed following partial recrystallization of high-purity body-centred cubic refractory metals. Their morphology is similar to that previously observed in aluminium and is in good agreement with the predictions of a kinetic model based on t...

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Bibliographic Details
Published in:Scripta materialia 2007-05, Vol.56 (10), p.903-906
Main Authors: Martorano, M.A., Sandim, H.R.Z., Fortes, M.A., Padilha, A.F.
Format: Article
Language:English
Subjects:
Aluminium
Aluminum
BCC metals
Boundaries
Dislocations
Grain boundaries
Grain boundary migration
Recrystallization
Recrystallized microstructure
Refractory metals
Serrated boundaries
Static recrystallization
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Summary:Protrusions at migrating high-angle grain boundaries were observed following partial recrystallization of high-purity body-centred cubic refractory metals. Their morphology is similar to that previously observed in aluminium and is in good agreement with the predictions of a kinetic model based on the sinusoidal variation of the local driving pressure along the boundary. The heterogeneous dislocation structure intersecting the boundary is considered to cause this sinusoidal variation and, therefore, the growth of protrusions in the high-purity metals.
ISSN:1359-6462
1872-8456
DOI:10.1016/j.scriptamat.2007.01.032