University of Oulu

Yi Xiong, Ze-wei Luan, Xiao-qin Zha, Yong Li, Yun Yue, Feng-zhang Ren, Shu-bo Wang, Wei Cao, Achieving superior strength and ductility combination in Fe–28Mn–8Al–1C low density steel by orthogonal rolling, Journal of Materials Research and Technology, Volume 25, 2023, Pages 6123-6133, ISSN 2238-7854,

Achieving superior strength and ductility combination in Fe–28Mn–8Al–1C low density steel by orthogonal rolling

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Author: Xiong, Yi1,2; Luan, Ze-wei1; Zha, Xiao-qin3;
Organizations: 1School of Materials Science and Engineering, Henan University of Science and Technology, Luoyang 471023, China
2Provincial and Ministerial Co-construction of Collaborative Lnnovation Center for Non-ferrous Metal New Materials and Advanced Processing Technology, Luoyang 471023, Henan, China
3Luoyang Ship Material Research Institute, Luoyang 471000, Henan, China
4Central Iron and Steel Research Institute, Beijing 100081, China
5Nano and Molecular Systems Research Unit, University of Oulu, FIN-90014, Finland
Format: article
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 3.9 MB)
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Language: English
Published: Elsevier, 2023
Publish Date: 2023-08-08


Fe–Mn–Al–C austenitic steels have promising prospects for lightweight applications, due to their low density, excellent strength, and ductility. But the specific strength ratio of these alloys are still low as compared to other alloys. Herein, an orthogonal rolling (OR) process was used to improve the mechanical strength of a Fe–28Mn–8Al–1C low-density steel. The effect of this deformation method on the microstructural evolution and mechanical properties was studied by means of microscopy techniques, e.g. optic, scanning and transmission electron microscope, electron backscattered diffraction, X-ray diffraction, micro hardness and tensile test measurements. Microstructural characterization results show that OR significantly promotes the activation of multiple slip systems within grains in the material. The development of more uniform deformation microstructure, compared with that that after unidirectional cold rolling to the same strain was mainly due the improvement of the uniformity of strain distribution by rolling deformation in multiple directions. It resulted in an average 84.5 nm sized ultrafine grain structures after 8-pass OR. The tensile and yield strengths were significantly increased to 1813 MPa and 1798 MPa, respectively. Despite of the still-exiting strength-ductility trade-off, a much higher elongation at tensile failure of 9.6% was achieved, compared to only 5.2% of unidirectional cold rolled material. This superior strength and ductility combination was likely promoted by the increased dislocation density and deformation substructures in forms of dislocation cells, and deformation twins induced by OR.

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Series: Journal of materials research and technology
ISSN: 2238-7854
ISSN-E: 2214-0697
ISSN-L: 2238-7854
Volume: 25
Pages: 6123 - 6133
DOI: 10.1016/j.jmrt.2023.07.059
Type of Publication: A1 Journal article – refereed
Field of Science: 216 Materials engineering
Funding: This work was supported by the National Natural Science Foundation of China (Grant No. U1804146, 51905153, and 52111530068); the Science and Technology Innovation Team of Henan University of Science and Technology (Grant No. 2015XTD006) and Major science and technology projects of Henan Province (Grant No. 221100230200).
Copyright information: © 2023 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (