Achieving superior strength-ductility balance via heterogeneous structure and successive TWIP+TRIP effects in medium Mn steel
In the present work, the medium Mn steel with a strength - ductility product of 49.5 GPa·% was fabricated by a hot rolling, quenching and intercritical annealing process. The excellent mechanical property is attributed to the heterogeneous austenite morphologies, i.e., lath, granular and equiaxed au...
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Elsevier
2024-11-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785424022324 |
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| author | Wen Peng Feifan Wang Yunlong Wang Jun Chen Jie Sun Ning Guo Jiyuan Liu |
| author_facet | Wen Peng Feifan Wang Yunlong Wang Jun Chen Jie Sun Ning Guo Jiyuan Liu |
| author_sort | Wen Peng |
| collection | DOAJ |
| description | In the present work, the medium Mn steel with a strength - ductility product of 49.5 GPa·% was fabricated by a hot rolling, quenching and intercritical annealing process. The excellent mechanical property is attributed to the heterogeneous austenite morphologies, i.e., lath, granular and equiaxed austenite, and the successive TWIP + TRIP effects. The present work especially focus on two aspects: i) the evolution of micro-strain between different morphologies of austenite and ferrite during tensile deformation and its impact on the strain hardening caused by the transformation induced plasticity (TRIP) effect; and ii) the strengthening mechanisms of successive twin induced plasticity (TWIP) and TRIP effects in heterogeneous structures. Under different austenite/ferrite micro-strain interactions, the sequence of TRIP effect is in granular, lath and equiaxed austenite grains. Prior to this, the TWIP effect mainly enhance the strength of austenite, particularly equiaxed grains, which act as a high-strength skeleton structure, postponing the initiation of necking. |
| format | Article |
| id | doaj-art-fa12b54e8c7842f6a998042d4fe4267e |
| institution | Kabale University |
| issn | 2238-7854 |
| language | English |
| publishDate | 2024-11-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj-art-fa12b54e8c7842f6a998042d4fe4267e2024-12-26T08:54:08ZengElsevierJournal of Materials Research and Technology2238-78542024-11-013321252135Achieving superior strength-ductility balance via heterogeneous structure and successive TWIP+TRIP effects in medium Mn steelWen Peng0Feifan Wang1Yunlong Wang2Jun Chen3Jie Sun4Ning Guo5Jiyuan Liu6State Key Laboratory of Rolling and Automation, Northeastern University, Shenyang, 110819, ChinaState Key Laboratory of Rolling and Automation, Northeastern University, Shenyang, 110819, ChinaState Key Laboratory of Rolling and Automation, Northeastern University, Shenyang, 110819, ChinaState Key Laboratory of Rolling and Automation, Northeastern University, Shenyang, 110819, ChinaState Key Laboratory of Rolling and Automation, Northeastern University, Shenyang, 110819, ChinaSchool of Mechanical Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan, 250353, China; Shandong Institute of Mechanical Design and Research, Jinan, 250031, ChinaSchool of Mechanical Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan, 250353, China; Shandong Institute of Mechanical Design and Research, Jinan, 250031, China; Corresponding author. School of Mechanical Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan , 250353, China.In the present work, the medium Mn steel with a strength - ductility product of 49.5 GPa·% was fabricated by a hot rolling, quenching and intercritical annealing process. The excellent mechanical property is attributed to the heterogeneous austenite morphologies, i.e., lath, granular and equiaxed austenite, and the successive TWIP + TRIP effects. The present work especially focus on two aspects: i) the evolution of micro-strain between different morphologies of austenite and ferrite during tensile deformation and its impact on the strain hardening caused by the transformation induced plasticity (TRIP) effect; and ii) the strengthening mechanisms of successive twin induced plasticity (TWIP) and TRIP effects in heterogeneous structures. Under different austenite/ferrite micro-strain interactions, the sequence of TRIP effect is in granular, lath and equiaxed austenite grains. Prior to this, the TWIP effect mainly enhance the strength of austenite, particularly equiaxed grains, which act as a high-strength skeleton structure, postponing the initiation of necking.http://www.sciencedirect.com/science/article/pii/S2238785424022324Medium Mn steelHeterogeneous structureTRIPTWIPStrain hardening |
| spellingShingle | Wen Peng Feifan Wang Yunlong Wang Jun Chen Jie Sun Ning Guo Jiyuan Liu Achieving superior strength-ductility balance via heterogeneous structure and successive TWIP+TRIP effects in medium Mn steel Journal of Materials Research and Technology Medium Mn steel Heterogeneous structure TRIP TWIP Strain hardening |
| title | Achieving superior strength-ductility balance via heterogeneous structure and successive TWIP+TRIP effects in medium Mn steel |
| title_full | Achieving superior strength-ductility balance via heterogeneous structure and successive TWIP+TRIP effects in medium Mn steel |
| title_fullStr | Achieving superior strength-ductility balance via heterogeneous structure and successive TWIP+TRIP effects in medium Mn steel |
| title_full_unstemmed | Achieving superior strength-ductility balance via heterogeneous structure and successive TWIP+TRIP effects in medium Mn steel |
| title_short | Achieving superior strength-ductility balance via heterogeneous structure and successive TWIP+TRIP effects in medium Mn steel |
| title_sort | achieving superior strength ductility balance via heterogeneous structure and successive twip trip effects in medium mn steel |
| topic | Medium Mn steel Heterogeneous structure TRIP TWIP Strain hardening |
| url | http://www.sciencedirect.com/science/article/pii/S2238785424022324 |
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