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  Effect of silicon, manganese and heating rate on the ferrite recrystallization kinetics

Shah, V., Krugla, M., Offerman, S. E., Sietsma, J., & Hanlon, D. N. (2020). Effect of silicon, manganese and heating rate on the ferrite recrystallization kinetics. ISIJ International, 60(6), 1312-1323. doi:10.2355/isijinternational.ISIJINT-2019-475.

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ISIJ Int. 60(6)_ 1312-1323 (2020) - 60_ISIJINT-2019-475.pdf (Publisher version), 5MB
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ISIJ Int. 60(6)_ 1312-1323 (2020) - 60_ISIJINT-2019-475.pdf
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2020
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ISIJ
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 Creators:
Shah, Vitesh1, 2, Author              
Krugla, Monika2, 3, Author
Offerman, S. Erik2, Author
Sietsma, Jilt2, Author
Hanlon, David Neal3, Author
Affiliations:
1Theory and Simulation, Microstructure Physics and Alloy Design, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society, ou_1863392              
2Department of Materials Science and Engineering, Delft University of Technology, Mekelweg 2, Delft, 2628 CD, Netherlands, ou_persistent22              
3Tata Steel Research and Development, Ijmuiden, 1970 CA, Netherlands, ou_persistent22              

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Free keywords: Advanced high strength Steel; Atoms; Drag; Ferrite; Grain boundaries; Heating rate; High strength alloys; High strength steel; Kinetics; Manganese; Scanning electron microscopy; Silicon, Constant growth rates; Interaction energies; Microstructure observation; Random nucleation; Recrystallization kinetics; Solute drag effects; Start temperature; Wagner interaction parameter, Recrystallization (metallurgy)
 Abstract: This study presents the effects of silicon (Si) and manganese (Mn) concentration and of heating rate on the ferrite recrystallization kinetics in seven model alloys with different Si and Mn concentrations, which are of relevance for the development of Advanced High Strength Steels (AHSS). The recrystallization kinetics were studied with in-situ 2D X-ray Diffraction (2D-XRD) and ex-situ microstructure observations using Scanning Electron Microscopy (SEM). The experimentally observed differences in the recrystallization start temperature (Ts), dependent on the Si and Mn concentrations and the heating rate, can be described by combining the non-isothermal JMAK-model with a modified version of Cahn's solute drag model. The modified Cahn model takes into account - in an approximate manner - that the interaction energy of the solute atoms with the grain boundary depends on the Si and Mn concentrations in the boundary and the Wagner interaction parameters. The collective contribution of the Si and Mn atoms to the increase in the Ts with respect to the reference alloy (without Si and with very little Mn) is higher than would be expected from the simple addition of the effects of the Si and Mn concentrations alone. This means that the interaction between Si and Mn atoms leads to an additional increase in Ts, i.e. a coupled solute drag effect. For the later stages of recrystallization, we have studied the change in the number density and the growth rates of the recrystallizing grains using SEM. The observations show non-random nucleation, early impingement of the grains in the normal-direction and non-constant growth rates of recrystallizing grains. © 2020 ISIJ.

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Language(s): eng - English
 Dates: 2020-06-15
 Publication Status: Published in print
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Title: ISIJ International
  Abbreviation : ISIJ Int.
Source Genre: Journal
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Publ. Info: Tokyo : 社団法人 日本鉄鋼協会
Pages: - Volume / Issue: 60 (6) Sequence Number: - Start / End Page: 1312 - 1323 Identifier: ISSN: 0915-1559
CoNE: https://pure.mpg.de/cone/journals/resource/954928489357