The static and metadynamic recrystallization behaviour of an X60 Nb Microalloyed Steel

Hodgson, Peter, Zahiri, S.H. and Whale, J.J. 2004, The static and metadynamic recrystallization behaviour of an X60 Nb Microalloyed Steel, ISIJ international, vol. 44, no. 7, pp. 1224-1229, doi: 10.2355/isijinternational.44.1224.

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Title The static and metadynamic recrystallization behaviour of an X60 Nb Microalloyed Steel
Author(s) Hodgson, Peter
Zahiri, S.H.
Whale, J.J.
Journal name ISIJ international
Volume number 44
Issue number 7
Start page 1224
End page 1229
Publisher Iron and Steel Institute of Japan
Place of publication Tokyo, Japan
Publication date 2004
ISSN 0915-1559
Keyword(s) static recrystallization
metadynamic recrystallization
Nb steel
thermomechanical processing
Summary A rapid method has been developed to determine recrystallization kinetics of Nb microalloyed steels by interrupted hot torsion test. The softening behaviour was achieved as a function of different processing parameters. The method clearly identified three regions, where the strain dependency of the recrystallization rate varied. Firstly, at large strains the rate of recrystallization was not a function of strain; this is generally ascribed to metadynamic recrystallization. At lower strains the time to 50% recrystallization showed a power low relationship with strain, characteristic of static recrystallization. A further break point exists on the time for 50% softening curve when strain induced precipitation occurs in the material. The onset of strain induced precipitation was at strains below the strain to the peak stress at temperatures below 900°C. The experimental results were used to estimate the time for 50% softening and to anticipate the onset of the strain induced precipitation for the alloy of this study. Grain refinement of the recrystallized austenite continued to strains significantly beyond the peak stress and beyond the static to metadynamic recrystallization rate transition.
Language eng
DOI 10.2355/isijinternational.44.1224
Field of Research 091207 Metals and Alloy Materials
HERDC Research category C1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2004, ISIJ
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Document type: Journal Article
Collection: School of Engineering and Technology
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