Enhancement of the strength–ductility trade-off in a heterogeneous medium Mn steel through multiple synergistic effects of deformation mechanisms
In this work, multiple deformation/strengthening mechanisms were developed into medium manganese steel (MMnS) based on a simple cold-rolling and intercritical annealing process. The prepared MMnS comprises of bimodal heterogeneous austenite encompassing approximately 60% coarse grains and 40% fine g...
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| Format: | Article |
| Language: | English |
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Elsevier
2025-01-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785424029685 |
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| author | Hao Chen Haifeng Xu Wenquan Cao Caidong Zhang Shenghai Lu Zejun Chen |
| author_facet | Hao Chen Haifeng Xu Wenquan Cao Caidong Zhang Shenghai Lu Zejun Chen |
| author_sort | Hao Chen |
| collection | DOAJ |
| description | In this work, multiple deformation/strengthening mechanisms were developed into medium manganese steel (MMnS) based on a simple cold-rolling and intercritical annealing process. The prepared MMnS comprises of bimodal heterogeneous austenite encompassing approximately 60% coarse grains and 40% fine grains. The heterogeneous design tailors the diverse austenite stability to achieve sustained and multilevel strain-induced martensitic transformation (SIMT), balancing the strain hardening ability, ductility and fracture. Preferably, the strengthening of fine austenite includes the twinning-induced plasticity (TWIP) effect, stacking fault networks, Lomer–Cottrell (L–C) locks, and nano-VC particles, while coarse austenite only triggers the transformation-induced plasticity (TRIP) effect. The heterostructured steel achieved an ultrahigh tensile strength of over 1.5 GPa, and an excellent elongation of 49.6% due to the multiple synergistic effects of deformation mechanisms. Our results indicated that the coordination of multiple mechanisms may be an effective method to enhance the strength–ductility trade-off of MMnS. |
| format | Article |
| id | doaj-art-bcdae391735e427b8769709cf04715f2 |
| institution | Kabale University |
| issn | 2238-7854 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj-art-bcdae391735e427b8769709cf04715f22025-01-19T06:25:41ZengElsevierJournal of Materials Research and Technology2238-78542025-01-013419551965Enhancement of the strength–ductility trade-off in a heterogeneous medium Mn steel through multiple synergistic effects of deformation mechanismsHao Chen0Haifeng Xu1Wenquan Cao2Caidong Zhang3Shenghai Lu4Zejun Chen5College of Materials Science and Engineering, Chongqing University, Chongqing, 400044, ChinaSpecial Steel department of Central Iron and Steel Research Institute (CISRI), Beijing, 100081, ChinaSpecial Steel department of Central Iron and Steel Research Institute (CISRI), Beijing, 100081, ChinaHBIS Group Technology Research Institute, Hebei Iron and Steel Group Co. Ltd, Shijiazhuang, PR ChinaHBIS Group Technology Research Institute, Hebei Iron and Steel Group Co. Ltd, Shijiazhuang, PR ChinaCollege of Materials Science and Engineering, Chongqing University, Chongqing, 400044, China; Corresponding author.In this work, multiple deformation/strengthening mechanisms were developed into medium manganese steel (MMnS) based on a simple cold-rolling and intercritical annealing process. The prepared MMnS comprises of bimodal heterogeneous austenite encompassing approximately 60% coarse grains and 40% fine grains. The heterogeneous design tailors the diverse austenite stability to achieve sustained and multilevel strain-induced martensitic transformation (SIMT), balancing the strain hardening ability, ductility and fracture. Preferably, the strengthening of fine austenite includes the twinning-induced plasticity (TWIP) effect, stacking fault networks, Lomer–Cottrell (L–C) locks, and nano-VC particles, while coarse austenite only triggers the transformation-induced plasticity (TRIP) effect. The heterostructured steel achieved an ultrahigh tensile strength of over 1.5 GPa, and an excellent elongation of 49.6% due to the multiple synergistic effects of deformation mechanisms. Our results indicated that the coordination of multiple mechanisms may be an effective method to enhance the strength–ductility trade-off of MMnS.http://www.sciencedirect.com/science/article/pii/S2238785424029685Medium-Mn steelHeterogeneous structureStacking fault networksL–C locksTRIP/TWIP effects |
| spellingShingle | Hao Chen Haifeng Xu Wenquan Cao Caidong Zhang Shenghai Lu Zejun Chen Enhancement of the strength–ductility trade-off in a heterogeneous medium Mn steel through multiple synergistic effects of deformation mechanisms Journal of Materials Research and Technology Medium-Mn steel Heterogeneous structure Stacking fault networks L–C locks TRIP/TWIP effects |
| title | Enhancement of the strength–ductility trade-off in a heterogeneous medium Mn steel through multiple synergistic effects of deformation mechanisms |
| title_full | Enhancement of the strength–ductility trade-off in a heterogeneous medium Mn steel through multiple synergistic effects of deformation mechanisms |
| title_fullStr | Enhancement of the strength–ductility trade-off in a heterogeneous medium Mn steel through multiple synergistic effects of deformation mechanisms |
| title_full_unstemmed | Enhancement of the strength–ductility trade-off in a heterogeneous medium Mn steel through multiple synergistic effects of deformation mechanisms |
| title_short | Enhancement of the strength–ductility trade-off in a heterogeneous medium Mn steel through multiple synergistic effects of deformation mechanisms |
| title_sort | enhancement of the strength ductility trade off in a heterogeneous medium mn steel through multiple synergistic effects of deformation mechanisms |
| topic | Medium-Mn steel Heterogeneous structure Stacking fault networks L–C locks TRIP/TWIP effects |
| url | http://www.sciencedirect.com/science/article/pii/S2238785424029685 |
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