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

A. Moshiri; A. Zarei-Hanzaki; A.S. Anousheh; H.R. Abedi; Seok Su Sohn; Junha Yang; M. Jaskari; L.P. Karjalainen; F. Berto

Journal of Materials Research and Technology (Nov 2021)

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

A. Moshiri,
A. Zarei-Hanzaki,
A.S. Anousheh,
H.R. Abedi,
Seok Su Sohn,
Junha Yang,
M. Jaskari,
L.P. Karjalainen,
F. Berto

Affiliations

A. Moshiri: Hot Deformation and Thermomechanical Processing Laboratory of High Performance Engineering Materials, School of Metallurgy and Materials Engineering, College of Engineering, University of Tehran, Tehran, Iran
A. Zarei-Hanzaki: Hot Deformation and Thermomechanical Processing Laboratory of High Performance Engineering Materials, School of Metallurgy and Materials Engineering, College of Engineering, University of Tehran, Tehran, Iran; Corresponding author.
A.S. Anousheh: Hot Deformation and Thermomechanical Processing Laboratory of High Performance Engineering Materials, School of Metallurgy and Materials Engineering, College of Engineering, University of Tehran, Tehran, Iran
H.R. Abedi: School of Metallurgy & Materials Engineering, Iran University of Science and Technology (IUST), Tehran, Iran; Corresponding author.
Seok Su Sohn: Department of Material Science and Engineering, Korea University, 145 Anam-Ro, Seongbuk-Gu, Seoul, 02841, Republic of Korea
Junha Yang: Center for High Entropy Alloys, Pohang University of Science and Technology, Pohang, 37673, Republic of Korea
M. Jaskari: Kerttu Saalasti Institute, Future Manufacturing Technologies Group, University of Oulu, Pajatie 5, Nivala, FI-85500, Finland
L.P. Karjalainen: Centre for Advanced Steels Research, Materials and Mechanical Engineering Unit, University of Oulu, Oulu, Finland
F. Berto: Department of Mechanical and Industrial Engineering, Norwegian University of Science and Technology, Trondheim, 7491, Norway

Journal volume & issue: Vol. 15
pp. 6136 – 6154

Abstract

Read online

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.

Published in Journal of Materials Research and Technology

ISSN: 2238-7854 (Print); 2214-0697 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Technology: Mining engineering. Metallurgy
Website: https://www.journals.elsevier.com/journal-of-materials-research-and-technology/

About the journal

Abstract

Keywords