University of Oulu

Shyamal, S., Das, S. R., Jaskari, M., Porter, D. A., Karjalainen, L. P., & Sahu, P. (2021). Graded deformation in an Fe-Mn-Al-C steel under bending fatigue. Materials Letters, 285, 129002.

Graded deformation in an Fe-Mn-Al-C steel under bending fatigue

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Author: Shyamal, S.1; Das, S.R.1; Jaskari, M.2;
Organizations: 1Department of Physics, Jadavpur University, Kolkata 700 032, India
2Kerttu Saalasti Institute, University of Oulu, FIN-85500, Finland
3Centre for Advanced Steels Research, University of Oulu, FIN–90014, Finland
Format: article
Version: accepted version
Access: open
Online Access: PDF Full Text (PDF, 2.8 MB)
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Language: English
Published: Elsevier, 2021
Publish Date: 2023-04-17


Cyclic behavior of a high-Mn austenitic steel with fine (~2 µm) and larger (~5 µm) grains was investigated under high-cycle bending fatigue at room temperature. Microhardness initially increased as a sign of cyclic hardening until 20,000 cycles and saturated thereafter. Deformation mechanisms varied widely in grains, depending on their sizes. Stacking faults were predominant in the fine grains, while interconnected dislocation cells were observed within the larger grains. Dislocation densities estimated by X-ray diffraction were relatively low ~1014 m−2.

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Series: Materials letters
ISSN: 0167-577X
ISSN-E: 1873-4979
ISSN-L: 0167-577X
Volume: 285
Article number: 129002
DOI: 10.1016/j.matlet.2020.129002
Type of Publication: A1 Journal article – refereed
Field of Science: 216 Materials engineering
214 Mechanical engineering
Copyright information: © 2020. This manuscript version is made available under the CC-BY-NC-ND 4.0 license