University of Oulu

Somani, M., Porter, D., Karjalainen, L., Kantanen, P., Kömi, J. & Misra, D. (2019). Static recrystallization characteristics and kinetics of high-silicon steels for direct quenching and partitioning. International Journal of Materials Research, 110(3), 183-193.

Static recrystallization characteristics and kinetics of high-silicon steels for direct quenching and partitioning

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Author: Somani, Mahesh C.1; Porter, David A.1; Karjalainen, Pentti1;
Organizations: 1University of Oulu, Faculty of Technology, Centre for Advanced Steels Research, Oulu, Finland
2University of Texas at El Paso, Dept. of Metallurgical, Materials and Biomedical Engineering, El Paso, TX, USA
Format: article
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 0.4 MB)
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Language: English
Published: De Gruyter, 2019
Publish Date: 2023-03-07


In the direct quenching and partitioning (DQ&P) process,tough ultra-high-strength steel is made by combining thermomechanical processing with quenching and partitioning to obtain martensite toughened by thin films of retained austenite. The hot rolling stage with deformation and recrystallization between the rolling passes affects the state of the austenite before quenching and partitioning. This paper describes the static recrystallization kinetics of two steels with compositions suited to DQ&P processing, viz. (in wt.%) 0.3C-1Si-2Mn-1Cr and 0.25C-1.5Si-3Mn. The stress relaxation technique on a Gleeble thermomechanical simulator provided recrystallization times over a wide range of temperature, strain, strain rate and initial grain size. The higher levels of Si and Mn made the recrystallization kinetics less sensitive to strain, strain rate and temperature. The equations derived to describe the recrystallization kinetics can be used in the design of the rough rolling part of thermomechanical processing.

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Series: International journal of materials research
ISSN: 1862-5282
ISSN-E: 2195-8556
ISSN-L: 1862-5282
Volume: 110
Issue: 3
Pages: 183 - 193
DOI: 10.3139/146.111744
Type of Publication: A1 Journal article – refereed
Field of Science: 216 Materials engineering
Funding: The funding of this research activity through the RFCS Grant Agreement RFSR-CT-2014-00019 is gratefully acknowledged.
Copyright information: © 2019, Carl Hanser Verlag, München. This work is licensed under the Creative Commons Attribution 4.0 International License.