University of Oulu

Sadeghpour, S.; Javaheri, V.; Kermanpur, A.; Kömi, J. Insight to the Influence of Ti Addition on the Strain-Induced Martensitic Transformation in a High (about 7 wt.%) Mn Stainless Steel. Metals 2020, 10, 568. https://doi.org/10.3390/met10050568

Insight to the influence of Ti addition on the strain-induced martensitic transformation in a high (about 7 wt.%) Mn stainless steel

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Author: Sadeghpour, Saeed1; Javaheri, Vahid1; Kermanpur, Ahmad2;
Organizations: 1Centre for Advanced Steels Research, University of Oulu, 90014 Oulu, Finland
2Department of Materials Engineering, Isfahan University of Technology, Isfahan 8415683111, Iran
Format: article
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 7.3 MB)
Persistent link: http://urn.fi/urn:nbn:fi-fe2020060841134
Language: English
Published: Multidisciplinary Digital Publishing Institute, 2020
Publish Date: 2020-06-08
Description:

Tiivistelmä

The kinetics of strain-induced martensite (SIM) formation in a Ti-bearing 201L stainless steel were evaluated and compared to the existing results of two conventional stainless steel grades; i.e., 201L and 304L AISI. The effects of strain rate and rolling pass reduction on the kinetics of SIM formation during cold rolling were investigated. The Ti-microalloying was found to be intensifying the transformation due to lowering the stacking fault energy. It was seen that decreasing the rolling pass reduction strongly affected the variation of SIM volume fraction. Furthermore, a close correlation between the hardness and strain-induced transformation was found arising from microstructural evolution during the cold rolling process. Three stages in the hardening behavior were detected associated with lath-type martensite formation, transition stage of martensite laths break up and formation of dislocation-cell-type martensite.

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Series: Metals
ISSN: 2075-4701
ISSN-E: 2075-4701
ISSN-L: 2075-4701
Volume: 10
Issue: 5
Article number: 568
DOI: 10.3390/met10050568
OADOI: https://oadoi.org/10.3390/met10050568
Type of Publication: A1 Journal article – refereed
Field of Science: 216 Materials engineering
Subjects:
Funding: The authors are grateful for financial support from Academy of Finland (#311934—Genome of Steel Project). Vahid Javaheri would also like to thank the Jenny and Antti Wihuri Foundation for awarding a personal grant.
Copyright information: © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
  https://creativecommons.org/licenses/by/4.0/