University of Oulu

P.K. Kantanen, V. Javaheri, M.C. Somani, D.A. Porter, J.I. Kömi, Effect of deformation and grain size on austenite decomposition during quenching and partitioning of (high) silicon‑aluminum steels, Materials Characterization, 2020, 110793, ISSN 1044-5803, https://doi.org/10.1016/j.matchar.2020.110793

Effect of deformation and grain size on austenite decomposition during quenching and partitioning of (high) silicon‑aluminum steels

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Author: Kantanen, P.K.1; Javaheri, V.1; Somani, M.C.1;
Organizations: 1Materials and Mechanical Engineering, CASR, University of Oulu, Oulu, Finland
Format: article
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 11.9 MB)
Persistent link: http://urn.fi/urn:nbn:fi-fe20201222102651
Language: English
Published: Elsevier, 2020
Publish Date: 2020-12-22
Description:

Abstract

The effect of austenite deformation on carbon partitioning and transformation to athermal and isothermal martensite, and bainite during quenching and partitioning (QP) is described for three steel compositions: Fe-0.3C-0.6Si-1.1Al, Fe-0.3C-1.0Si and Fe-0.3C-0.5Si-0.5Al. Microstructures were characterized using SEM-EBSD, TEM and XRD. Austenite decomposition kinetics was investigated using dilatometry. Deformation close to the no-recrystallization temperature refines the grain size, lowers the martensite start temperature and affects the stability of austenite during QP processing. The results in respect of dilatation measurements and retained austenite contents at room temperature corroborate the QP microstructures and their hardness and can help in designing optimal QP treatments for these novel steels.

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Series: Materials characterization
ISSN: 1044-5803
ISSN-E: 1873-4189
ISSN-L: 1044-5803
Volume: In press
DOI: 10.1016/j.matchar.2020.110793
OADOI: https://oadoi.org/10.1016/j.matchar.2020.110793
Type of Publication: A1 Journal article – refereed
Field of Science: 216 Materials engineering
Subjects:
Funding: The funding of this research activity through the RFCS Grant Agreement RFSR-CT-2014-00019 is gratefully acknowledged. A part of the activity was carried out using the resources provided by the Academy of Finland under the auspices of the Genome of Steel (Profi3) project #311934.
Copyright information: © 2020 The Author(s). Published by Elsevier Inc. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
  https://creativecommons.org/licenses/by-nc-nd/4.0/