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Effect of Initial Grain Size on the Dynamic Recrystallization Behaviours of Austenite

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Abstract:

The effect of initial grain size on the recrystallization behaviour of a type 304 austenitic stainless steel was investigated using hot torsion. Refinement of the initial grain size to 8 μm had a considerable effect on the flow curve shapes, peak and critical strains and also on DRX kinetics, compared with an initial grain size of 35 μm. Microstructural investigations using EBSD suggest a transition from conventional (discontinuous) to continuous dynamic recrystallization with decreasing initial grain size. Also, there was a moderate effect of initial grain size on the DRX grain size.

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Periodical:

Materials Science Forum (Volumes 561-565)

Pages:

33-36

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.561-565.33

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Online since:

October 2007

Authors:

A. Dehghan-Manshadi, Peter Hodgson

Keywords:

Dynamic Recrystallization (DRX), Electron Backscatter Diffraction (EBSD), Hot Deformation, Initial Grain Size, Stainless Steel (SS)

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© 2007 Trans Tech Publications Ltd. All Rights Reserved

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References

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