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

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)6136-6154
Number of pages19
JournalJournal of Materials Research and Technology
Volume15
DOIs
Publication statusPublished - 2021 Nov 1

Keywords

  • Cyclic deformation
  • Damage mechanism
  • Dwell-fatigue
  • Dynamic strain aging
  • Fractography
  • Low-density steel

ASJC Scopus subject areas

  • Ceramics and Composites
  • Biomaterials
  • Surfaces, Coatings and Films
  • Metals and Alloys

Fingerprint

Dive into the research topics of 'On the fatigue and dwell-fatigue behavior of a low-density steel and the correlated microstructure origin of damage mechanism'. Together they form a unique fingerprint.

Cite this