Nucleation During Recrystallisation in Ti-SULC Steel

N.C.A. Seaton; David J. Prior

doi:10.4028/www.scientific.net/MSF.467-470.93

Paper Titles

Orientation Spread in Deformed Grains and Its Relevance to Recrystallization Texture Development in IF Steels
p.69

Investigation of Nucleation Mechanisms of Recrystallization in Warm Rolled Fe₃Al Base Alloys
p.75

In Situ Investigation of Bulk Nucleation by X-Ray Diffraction
p.81

A Statistical Mechanics Theory of Grain Deformation and Its Prediction of Dynamical Recovery and Recrystallization
p.87

Nucleation During Recrystallisation in Ti-SULC Steel
p.93

Orientation Aspects of the Recrystallization Nucleation in Highly Deformed Polycrystalline Copper
p.99

Nucleation in Recrystallization
p.107

Inhomogeneous Deformation and Microstructural Evolution during the Hot Deformation of Al-4.98%Mg
p.117

Study of Local Microstructure and Texture Heterogeneities in Hot Rolled CGO Fe-3%Si Sheets
p.123

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Nucleation During Recrystallisation in Ti-SULC Steel

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 550°C are documented via still images, videos and automated EBSD maps. Recrystallisation begins rapidly but slows down within an hour. A temperature increase to 850°C 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.