University of Oulu

A Pohjonen et al 2019 J. Phys.: Conf. Ser. 1270 012013. https://doi.org/10.1088/1742-6596/1270/1/012013

Determination of static recrystallization and recovery parameters for steel by fitting model to stress relaxation data

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Author: Pohjonen, A1; Seppälä, O1; Jokiranta, A1;
Organizations: 1Materials and Mechanical Engineering, Faculty of Technology, University of Oulu, PL4200, 90014, Oulu, Finland
Format: article
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 2.9 MB)
Persistent link: http://urn.fi/urn:nbn:fi-fe2019081924666
Language: English
Published: IOP Publishing, 2019
Publish Date: 2019-08-19
Description:

Abstract

A model for static recrystallization by Zurob et al. [1] has been fitted to experimental stress relaxation [2] data obtained on a low-alloyed steel using a Gleeble thermomechanical simulator. The model has been implemented as an algorithm that calculates the stress relaxation as a function of time, including physical descriptions of the recovery and recrystallization processes. The activation energy and volume were used as fitting parameters for recovery, and the activation energy of diffusion and nucleation site density were used as the fitting parameters for recrystallization. The four fitting parameters were determined from the experimental data by applying the Nelder-Mead algorithm within Matlab software. It can be concluded from the preliminary results that Zurob's model can be successfully fitted to the stress relaxation data in order to illustrate the static restoration characteristics and kinetics in carbon steels using these fitting parameters.

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Series: Journal of physics. Conference series
ISSN: 1742-6588
ISSN-E: 1742-6596
ISSN-L: 1742-6588
Volume: 1270
Article number: 012013
DOI: 10.1088/1742-6596/1270/1/012013
OADOI: https://oadoi.org/10.1088/1742-6596/1270/1/012013
Host publication: 7th International Conference on Recrystallization and Grain Growth, 4–9 August 2019, Ghent, Belgium
Conference: International Conference on Recrystallization and Grain Growth
Type of Publication: A4 Article in conference proceedings
Field of Science: 216 Materials engineering
Subjects:
Funding: Financial support from the Academy of Finland through Genome of Steel project is gratefully acknowledged.
Copyright information: Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. Published under licence by IOP Publishing Ltd.
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