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Formation of ultrafine grained microstructures in steel through strain induced transformation during single pass hot rolling

Beladi, Hossein, Zarei-Hanzaki, A., Kelly, Georgina and Hodgson, Peter 2004, Formation of ultrafine grained microstructures in steel through strain induced transformation during single pass hot rolling, Materials science and technology, vol. 20, no. 2, pp. 213-220.

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Title Formation of ultrafine grained microstructures in steel through strain induced transformation during single pass hot rolling
Author(s) Beladi, Hossein
Zarei-Hanzaki, A.
Kelly, Georgina
Hodgson, Peter
Journal name Materials science and technology
Volume number 20
Issue number 2
Start page 213
End page 220
Publisher The Institute
Place of publication London, England
Publication date 2004-02
ISSN 0267-0836
1743-2847
Keyword(s) carbon steels
rolling
ultrafine grain size
Summary In the present study, wedge-shape samples were used to study the effect of strain induced transformation on the formation of ultrafine grained structures in steel by single pass rolling. The results showed two different transition strains for bainite formation and ultrafine ferrite (UFF) formation in the surface layer of strip at reductions of 40% and 70%, respectively, in a plain carbon steel. The bainitic microstructure formed by strain induced bainitic transformation during single pass rolling was also very fine. The evolution of UFF formation in the surface layer showed that ferrite coarsening is significantly reduced through strain induced transformation combined with rapid cooling in comparison with the centre of the strip. In the surface, the ferrite coarsening mostly occurred for intragranular nucleated grains (IG) rather than grain boundary (GB) ferrite grains. The results suggest that normal grain growth occurred during overall transformation in the GB ferrite grains. In the centre of the strip, there was significantly more coarsening of ferrite grains nucleated on the prior austenite grain boundaries.
Notes Reproduced with the specific permission of the copyright owner.
Language eng
Field of Research 091207 Metals and Alloy Materials
HERDC Research category C1 Refereed article in a scholarly journal
Copyright notice ©2004, IoM Communications Ltd
Free to Read? Yes
Persistent URL http://hdl.handle.net/10536/DRO/DU:30002835

Document type: Journal Article
Collections: School of Engineering and Technology
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Every reasonable effort has been made to ensure that permission has been obtained for items included in DRO. If you believe that your rights have been infringed by this repository, please contact drosupport@deakin.edu.au.