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A. Moshiri, A. Zarei-Hanzaki, A.S. Anousheh, H.R. Abedi, Seok Su Sohn, Junha Yang, M. Jaskari, L.P. Karjalainen, F. Berto, On the fatigue and dwell-fatigue behavior of a low-density steel and the correlated microstructure origin of damage mechanism, Journal of Materials Research and Technology, Volume 15, 2021, Pages 6136-6154, ISSN 2238-7854, https://doi.org/10.1016/j.jmrt.2021.10.135

On the fatigue and dwell-fatigue behavior of a low-density steel and the correlated microstructure origin of damage mechanism

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Author: Moshiri, A.1; Zarei-Hanzaki, A.1; Anousheh, A. S.1;
Organizations: 1Hot Deformation and Thermomechanical Processing Laboratory of High Performance Engineering Materials, School of Metallurgy and Materials Engineering, College of Engineering, University of Tehran, Tehran, Iran
2School of Metallurgy & Materials Engineering, Iran University of Science and Technology (IUST), Tehran, Iran
3Department of Material Science and Engineering, Korea University, 145 Anam-Ro, Seongbuk-Gu, Seoul, 02841, Republic of Korea
4Center for High Entropy Alloys, Pohang University of Science and Technology, Pohang, 37673, Republic of Korea
5Kerttu Saalasti Institute, Future Manufacturing Technologies Group, University of Oulu, Pajatie 5, Nivala, FI-85500, Finland
6Centre for Advanced Steels Research, Materials and Mechanical Engineering Unit, University of Oulu, Oulu, Finland
7Department of Mechanical and Industrial Engineering, Norwegian University of Science and Technology, Trondheim, 7491, Norway
Format: article
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 9.6 MB)
Persistent link: http://urn.fi/urn:nbn:fi-fe2022021519070
Language: English
Published: Elsevier, 2021
Publish Date: 2022-02-15
Description:

Abstract

The present work deals with revealing the fatigue and dwell-fatigue behavior and correlated damage mechanisms of Fe–Mn–Al–C lightweight steel. Surprisingly, alteration in loading mode from monotonic to cyclic induces reversible dislocation movement and facilitates the occurrence of dynamic strain aging. Additionally, applying dwell time by an acceleration of strain aging intensified stress asymmetry during dwell fatigue. The occurrence of strain aging has a bilateral effect on the crack initiation and growth. On one hand, strain aging stimulates twin formation and retards fatigue crack initiation, however, on the other hand, reduces hardening capacity, restricts the plastic deformation and facilitates crack propagation.

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Series: Journal of materials research and technology
ISSN: 2238-7854
ISSN-E: 2214-0697
ISSN-L: 2238-7854
Volume: 15
Pages: 6136 - 6154
DOI: 10.1016/j.jmrt.2021.10.135
OADOI: https://oadoi.org/10.1016/j.jmrt.2021.10.135
Type of Publication: A1 Journal article – refereed
Field of Science: 216 Materials engineering
Subjects:
Cyclic deformation
Damage mechanism
Dwell-fatigue
Dynamic strain aging
Fractography
Low-density steel
Article
Funding: This work was supported by the Korea University Grant for S.S. Sohn, by Korea Institute for Advancement of Technology (KIAT) grant funded by the Korea Government (MOTIE) (P0002019, The Competency Development Program for Industry Specialist). Also, the authors acknowledge the support of the Academy of Finland for the ‘‘Genome of Steel’’ project #311934.
Copyright information: © 2021 Published by Elsevier B.V. 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/