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Tailoring hetero-grained austenite via a cyclic thermomechanical process for achieving ultrahigh strength-ductility in medium-Mn steel
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Jia, Qixiang | - |
dc.contributor.author | Chen, Lei | - |
dc.contributor.author | Xing, Zhibin | - |
dc.contributor.author | Wang, Haoyu | - |
dc.contributor.author | Jin, Miao | - |
dc.contributor.author | Chen, Xiang | - |
dc.contributor.author | Choi, Howook | - |
dc.contributor.author | Han, Heung Nam | - |
dc.date.accessioned | 2022-06-21T08:22:06Z | - |
dc.date.available | 2022-06-21T08:22:06Z | - |
dc.date.created | 2022-05-31 | - |
dc.date.issued | 2022-08 | - |
dc.identifier.citation | Scripta Materialia, Vol.217, p. 114767 | - |
dc.identifier.issn | 1359-6462 | - |
dc.identifier.uri | https://hdl.handle.net/10371/182679 | - |
dc.description.abstract | In this study, a bimodal-grained austenite, composed of approximately 30% coarse grains and about 70% refined grains in (alpha+gamma) medium Mn steel, was designed and developed based on a novel and simple cyclic thermomechanical process. The austenite stability was adjusted using these hetero-structures to regulate the strain induced martensite transformation kinetics to balance the strength, ductility, and fracture resistance could be balanced. By coupling the transformation induced plasticity (TRIP) effect, hetero-deformation induced (HDI) strengthening and twinning-induced plasticity (TWIP) effect, the hetero-structured steel achieved an ultra-high tensile strength of nearly 1260 MPa and an elongation of approximately 70%, i.e., the product of strength and elongation of over 88 GPa%. This study presents a novel insight into an austenite-stability-guided microstructural design to address the strength-ductility/toughness trade-off in medium Mn steel. | - |
dc.language | 영어 | - |
dc.publisher | Pergamon Press Ltd. | - |
dc.title | Tailoring hetero-grained austenite via a cyclic thermomechanical process for achieving ultrahigh strength-ductility in medium-Mn steel | - |
dc.type | Article | - |
dc.identifier.doi | 10.1016/j.scriptamat.2022.114767 | - |
dc.citation.journaltitle | Scripta Materialia | - |
dc.identifier.wosid | 000797267300002 | - |
dc.identifier.scopusid | 2-s2.0-85129563848 | - |
dc.citation.startpage | 114767 | - |
dc.citation.volume | 217 | - |
dc.description.isOpenAccess | N | - |
dc.contributor.affiliatedAuthor | Han, Heung Nam | - |
dc.type.docType | Article | - |
dc.description.journalClass | 1 | - |
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