University of Oulu

Riaz, T., Shyamal, S., Shee, S. K., Karjalainen, L. P., & Sahu, P. (2023). X-ray line profile analysis on the deformation microstructure of Al-bearing high-Mn steels. Materials Characterization, 196, 112567.

X-ray line profile analysis on the deformation microstructure of Al-bearing high-Mn steels

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Author: Riaz, T.1; Shyamal, S.1; Shee, S. K.2;
Organizations: 1Department of Physics, Jadavpur University, Kolkata 700 032, India
2Department of Physics, Midnapore College, Midnapore 721 101, West Bengal, India
3Centre for Advanced Steels Research, University of Oulu, FIN–90014, Finland
Format: article
Version: accepted version
Access: embargoed
Persistent link:
Language: English
Published: Elsevier, 2023
Publish Date: 2024-12-16


X-ray line profile analyses results incorporating the dislocation induced strain anisotropy is reported to understand the influence of Al content on deformation microstructure of three high-Mn steels with different Al contents (0, 1, 3 wt%) deformed under uniaxial tension until fracture. Deformation induced ε-martensite was detected only in the deformation microstructure of the steel not containing any Al. However, deformation twinning and dislocation substructures were frequently observed for steels containing 1 wt% and 3 wt% Al, respectively. The population of screw dislocations in the microstructure increased with increasing Al content. Further, the estimated dislocation densities are in the order of ∼10¹⁵ m⁻² and that they gradually decrease with increasing Al content in the steel — the minimum value was estimated in 3Al steel, attributed to the interrelation between the stacking fault energy of the steel and dynamic recovery. Accordingly, the stacking fault energies of the steels estimated from a modified X-ray diffraction line profile analyses approach were: 18.1, 25.7 and 41.6 mJm⁻² for steels containing: 0, 1, 3 wt% Al, respectively — corresponding to a linear increment of ∼7.85 mJm⁻² per 1 wt% Al concentration. Transmission electron microscopy also corroborated the X-ray line profile analyses results.

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Series: Materials characterization
ISSN: 1044-5803
ISSN-E: 1873-4189
ISSN-L: 1044-5803
Volume: 196
Article number: 112567
DOI: 10.1016/j.matchar.2022.112567
Type of Publication: A1 Journal article – refereed
Field of Science: 216 Materials engineering
Funding: TR acknowledges a Government of India DST/Inspire fellowship (Grant no. IF170882) and SS acknowledges funding from the UGC-JRF Government of India scheme (Grant no. 521511).
Copyright information: © 2023. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http:/