Coupled strengthening in a medium manganese lightweight steel with an inhomogeneously grained structure of austenite
DC Field | Value | Language |
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dc.contributor.author | Lee, Chan-Young | - |
dc.contributor.author | Jeong, Junyeong | - |
dc.contributor.author | Han, Jeongho | - |
dc.contributor.author | Lee, Seung-Joon | - |
dc.contributor.author | Lee, Sukjin | - |
dc.contributor.author | Lee, Young-Kook | - |
dc.date.accessioned | 2022-07-16T00:17:28Z | - |
dc.date.available | 2022-07-16T00:17:28Z | - |
dc.date.created | 2021-05-13 | - |
dc.date.issued | 2015-02 | - |
dc.identifier.issn | 1359-6454 | - |
dc.identifier.uri | https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/157892 | - |
dc.description.abstract | The deformation mechanism of a medium-Mn lightweight steel with an inhomogeneously grained structure of austenite was investigated as a function of annealing temperature. All annealed specimens exhibited three different phases: gamma-austenite, delta-ferrite and alpha'-martensite. Specimens annealed at temperatures below 1000 degrees C exhibited high strain-hardening rates (SHRs) and good combinations of ultimate tensile strength and ductility (similar to 35,000-37,000 MPa%) due to the sequential occurrence of transformation-induced plasticity (TRIP) and twinning-induced plasticity (TWIP) during tensile deformation. The SHR-true strain curves of the annealed specimens are divided into four different stages: dynamic recovery of dislocations (stage I), active TRIP (stage II), slow TRIP (stage III) and mechanical twinning (stage IV). However, the specimen annealed at 1000 degrees C did not exhibit stage IV, most likely due to its coarse grain size. Whereas the TRIP occurred in coarse gamma-austenite grains at small tensile strains, the TWIP took place in fine gamma-austenite grains with a size of less than, similar to 10 mu m at large tensile strains. This result indicates that grain refinement induced the transition in deformation mechanism from the TRIP to the TWIP. The inhomogeneously grained structure of gamma-austenite in the annealed specimens consists of coarse grains pre-existing in the hot-rolled state and fine grains newly formed during annealing. | - |
dc.language | 영어 | - |
dc.language.iso | en | - |
dc.publisher | PERGAMON-ELSEVIER SCIENCE LTD | - |
dc.title | Coupled strengthening in a medium manganese lightweight steel with an inhomogeneously grained structure of austenite | - |
dc.type | Article | - |
dc.contributor.affiliatedAuthor | Han, Jeongho | - |
dc.identifier.doi | 10.1016/j.actamat.2014.10.032 | - |
dc.identifier.scopusid | 2-s2.0-84910608048 | - |
dc.identifier.wosid | 000348688300001 | - |
dc.identifier.bibliographicCitation | ACTA MATERIALIA, v.84, pp.1 - 8 | - |
dc.relation.isPartOf | ACTA MATERIALIA | - |
dc.citation.title | ACTA MATERIALIA | - |
dc.citation.volume | 84 | - |
dc.citation.startPage | 1 | - |
dc.citation.endPage | 8 | - |
dc.type.rims | ART | - |
dc.type.docType | 정기학술지(Article(Perspective Article포함)) | - |
dc.description.journalClass | 1 | - |
dc.description.isOpenAccess | N | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.relation.journalResearchArea | Materials Science | - |
dc.relation.journalResearchArea | Metallurgy & Metallurgical Engineering | - |
dc.relation.journalWebOfScienceCategory | Materials Science, Multidisciplinary | - |
dc.relation.journalWebOfScienceCategory | Metallurgy & Metallurgical Engineering | - |
dc.subject.keywordPlus | AL-C STEEL | - |
dc.subject.keywordPlus | DEFORMATION-BEHAVIOR | - |
dc.subject.keywordPlus | LOW-DENSITY | - |
dc.subject.keywordPlus | MECHANICAL-PROPERTIES | - |
dc.subject.keywordPlus | TENSILE DEFORMATION | - |
dc.subject.keywordPlus | INDUCED PLASTICITY | - |
dc.subject.keywordPlus | SIZE | - |
dc.subject.keywordPlus | MICROSTRUCTURE | - |
dc.subject.keywordPlus | TEMPERATURE | - |
dc.subject.keywordPlus | WEIGHT | - |
dc.subject.keywordAuthor | Grain size | - |
dc.subject.keywordAuthor | Mechanical properties | - |
dc.subject.keywordAuthor | Strain hardening rate | - |
dc.subject.keywordAuthor | Twinning | - |
dc.subject.keywordAuthor | TRIP-assisted steel | - |
dc.identifier.url | https://linkinghub.elsevier.com/retrieve/pii/S1359645414007964 | - |
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