The influence of Al content and heat treatment on the microstructure and properties of austenite-ferrite duplex Fe-Mn-Al-C lightweight steels
Abtract: In this study, the influence of Al content (9 wt% and 12 wt%) on the microstructure evolution, mechanical properties and deformation behavior of austenite-based Fe-Mn-Al-C lightweight steels were investigated. The Steel with 9 % Al content displayed a dual-phase structure with austenite and...
Saved in:
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2025-03-01
|
| Series: | Journal of Alloys and Metallurgical Systems |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2949917825000124 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1850054012338962432 |
|---|---|
| author | Rui Bai Yunfei Du Yaqin Zhang Xiuli He |
| author_facet | Rui Bai Yunfei Du Yaqin Zhang Xiuli He |
| author_sort | Rui Bai |
| collection | DOAJ |
| description | Abtract: In this study, the influence of Al content (9 wt% and 12 wt%) on the microstructure evolution, mechanical properties and deformation behavior of austenite-based Fe-Mn-Al-C lightweight steels were investigated. The Steel with 9 % Al content displayed a dual-phase structure with austenite and less than 5 % ferrite, while the Steel with 12 % Al content contained approximately 23 % ferrite and nanoscale κ-carbide precipitates, influenced by the Al content. Following aging treatment at 600 °C, both steels experienced notable microstructural changes. Coarse carbides, B2, D03, and β-Mn precipitates, appeared during the aging, leading to the deterioration of mechanical properties. The aging treatment improved strength but decreased ductility for both steels, with extended aging leading to deterioration attributed to coarse precipitate formation. Both steels demonstrated effective strain hardening behavior. The aging treatment on the steels significantly impacted the fracture morphologies. The investigation of deformation mechanisms reveals distinct behaviors under low strain conditions. The steels demonstrated a unique staggered dislocation structure and exceptional uniform elongation due to decreasing slip plane spacing. The strength was enhanced by interactions among dislocation arrangements within distinct domain boundaries. |
| format | Article |
| id | doaj-art-875d29fa8db94bc28b0c9d5203f7b6b5 |
| institution | DOAJ |
| issn | 2949-9178 |
| language | English |
| publishDate | 2025-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Alloys and Metallurgical Systems |
| spelling | doaj-art-875d29fa8db94bc28b0c9d5203f7b6b52025-08-20T02:52:24ZengElsevierJournal of Alloys and Metallurgical Systems2949-91782025-03-01910016210.1016/j.jalmes.2025.100162The influence of Al content and heat treatment on the microstructure and properties of austenite-ferrite duplex Fe-Mn-Al-C lightweight steelsRui Bai0Yunfei Du1Yaqin Zhang2Xiuli He3Corresponding author.; Department of Mechanical Engineering, Taiyuan Institute of Technology, Taiyuan, ChinaDepartment of Mechanical Engineering, Taiyuan Institute of Technology, Taiyuan, ChinaDepartment of Mechanical Engineering, Taiyuan Institute of Technology, Taiyuan, ChinaDepartment of Mechanical Engineering, Taiyuan Institute of Technology, Taiyuan, ChinaAbtract: In this study, the influence of Al content (9 wt% and 12 wt%) on the microstructure evolution, mechanical properties and deformation behavior of austenite-based Fe-Mn-Al-C lightweight steels were investigated. The Steel with 9 % Al content displayed a dual-phase structure with austenite and less than 5 % ferrite, while the Steel with 12 % Al content contained approximately 23 % ferrite and nanoscale κ-carbide precipitates, influenced by the Al content. Following aging treatment at 600 °C, both steels experienced notable microstructural changes. Coarse carbides, B2, D03, and β-Mn precipitates, appeared during the aging, leading to the deterioration of mechanical properties. The aging treatment improved strength but decreased ductility for both steels, with extended aging leading to deterioration attributed to coarse precipitate formation. Both steels demonstrated effective strain hardening behavior. The aging treatment on the steels significantly impacted the fracture morphologies. The investigation of deformation mechanisms reveals distinct behaviors under low strain conditions. The steels demonstrated a unique staggered dislocation structure and exceptional uniform elongation due to decreasing slip plane spacing. The strength was enhanced by interactions among dislocation arrangements within distinct domain boundaries.http://www.sciencedirect.com/science/article/pii/S2949917825000124Lightweight steelAging treatmentMicrostructure evolutionMechanical propertiesDeformation behavior |
| spellingShingle | Rui Bai Yunfei Du Yaqin Zhang Xiuli He The influence of Al content and heat treatment on the microstructure and properties of austenite-ferrite duplex Fe-Mn-Al-C lightweight steels Journal of Alloys and Metallurgical Systems Lightweight steel Aging treatment Microstructure evolution Mechanical properties Deformation behavior |
| title | The influence of Al content and heat treatment on the microstructure and properties of austenite-ferrite duplex Fe-Mn-Al-C lightweight steels |
| title_full | The influence of Al content and heat treatment on the microstructure and properties of austenite-ferrite duplex Fe-Mn-Al-C lightweight steels |
| title_fullStr | The influence of Al content and heat treatment on the microstructure and properties of austenite-ferrite duplex Fe-Mn-Al-C lightweight steels |
| title_full_unstemmed | The influence of Al content and heat treatment on the microstructure and properties of austenite-ferrite duplex Fe-Mn-Al-C lightweight steels |
| title_short | The influence of Al content and heat treatment on the microstructure and properties of austenite-ferrite duplex Fe-Mn-Al-C lightweight steels |
| title_sort | influence of al content and heat treatment on the microstructure and properties of austenite ferrite duplex fe mn al c lightweight steels |
| topic | Lightweight steel Aging treatment Microstructure evolution Mechanical properties Deformation behavior |
| url | http://www.sciencedirect.com/science/article/pii/S2949917825000124 |
| work_keys_str_mv | AT ruibai theinfluenceofalcontentandheattreatmentonthemicrostructureandpropertiesofausteniteferriteduplexfemnalclightweightsteels AT yunfeidu theinfluenceofalcontentandheattreatmentonthemicrostructureandpropertiesofausteniteferriteduplexfemnalclightweightsteels AT yaqinzhang theinfluenceofalcontentandheattreatmentonthemicrostructureandpropertiesofausteniteferriteduplexfemnalclightweightsteels AT xiulihe theinfluenceofalcontentandheattreatmentonthemicrostructureandpropertiesofausteniteferriteduplexfemnalclightweightsteels AT ruibai influenceofalcontentandheattreatmentonthemicrostructureandpropertiesofausteniteferriteduplexfemnalclightweightsteels AT yunfeidu influenceofalcontentandheattreatmentonthemicrostructureandpropertiesofausteniteferriteduplexfemnalclightweightsteels AT yaqinzhang influenceofalcontentandheattreatmentonthemicrostructureandpropertiesofausteniteferriteduplexfemnalclightweightsteels AT xiulihe influenceofalcontentandheattreatmentonthemicrostructureandpropertiesofausteniteferriteduplexfemnalclightweightsteels |