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Static and metadynamic recrystallization of interstitial free steels during hot deformation

Zahiri, Saden H., Byon, Sang Bin, Kim, Sung-II, Lee, Youngseog and Hodgson, Peter 2004, Static and metadynamic recrystallization of interstitial free steels during hot deformation, ISIJ international, vol. 44, no. 11, pp. 1918-1923, doi: 10.2355/isijinternational.44.1918.

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Title Static and metadynamic recrystallization of interstitial free steels during hot deformation
Author(s) Zahiri, Saden H.
Byon, Sang Bin
Kim, Sung-II
Lee, Youngseog
Hodgson, Peter
Journal name ISIJ international
Volume number 44
Issue number 11
Start page 1918
End page 1923
Publisher Iron and Steel Institute of Japan
Place of publication Tokyo, Japan
Publication date 2004
ISSN 0915-1559
1347-5460
Keyword(s) recrystallization
static
metadynamic
interstitial Free steels
boron
phosphorus
hot deformation
Summary A rapid method was used to identify kinetics of the recrystallization for two IF (Interstitial Free) steels which have different phosphorous and boron contents. The static and metadynamic softening behaviour of the materials for a range of strain rates and temperatures were quantified. The critical strain for initiation of strain independent softening was estimated for the IF steels in respect to the time for 50 percent softening after deformation. The results showed that the strain for the initiation of strain independent softening (often referred to as metadynamic recrystallization) varies with the Zener Hollomon parameter. Classic static recrystallization was observed at strains below the strain independent softening for all processing conditions and the strain rate had a strong effect on the time for strain independent softening. Results also revealed that static and metadynamic recrystallization was delayed owing to the phosphorous and boron alloying elements. Hence, the large strain at above no-recrystallization temperature may be required for the early stage of Finishing Stands Unit (FSU) in hot strip rolling mills to initiate austenite grain refinement of phosphorous and boron added IF steels.
Language eng
DOI 10.2355/isijinternational.44.1918
Field of Research 091499 Resources Engineering and Extractive Metallurgy not elsewhere classified
HERDC Research category C1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2004, ISIJ
Persistent URL http://hdl.handle.net/10536/DRO/DU:30002840

Document type: Journal Article
Collection: School of Engineering and Technology
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