Full metadata record
DC Field | Value | Language |
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dc.contributor.author | Moon, Joonoh | - |
dc.contributor.author | Park, Seong-Jun | - |
dc.contributor.author | Lee, Chang-Hoon | - |
dc.contributor.author | Hong, Hyun-Uk | - |
dc.contributor.author | Lee, Bong Ho | - |
dc.contributor.author | Kim, Sung-Dae | - |
dc.date.accessioned | 2023-10-16T18:10:20Z | - |
dc.date.available | 2023-10-16T18:10:20Z | - |
dc.date.created | 2023-03-15 | - |
dc.date.issued | 2023-03 | - |
dc.identifier.issn | 0921-5093 | - |
dc.identifier.uri | http://hdl.handle.net/20.500.11750/46501 | - |
dc.description.abstract | Four alloys based on the Fe–30Mn–(8.5–12)Al–(1.0–1.3)C (wt%) system were prepared to investigate the effects of microstructure evolution and κ-carbide precipitation behavior on hot ductility behavior of austenitic lightweight steels. Hot tension tests were carried out at temperatures of 500–1230 °C using a Gleeble simulator. At high temperatures above 1000 °C, dynamic recrystallization occurred in all alloys, leading to high tensile ductility. At temperatures of 700–900 °C, the ductility decreased in all alloys due to the intragranular precipitation of κ-carbide, with increases in the amounts of Al and C contents then leading to a greater loss of ductility due to the formation of coarse intergranular κ-carbides. The addition of Cr and Mo suppressed the precipitation of κ-carbide, reducing the extent of ductility loss. At 500 °C, the ductility was recovered due to a reduction of inter-/intragranular κ-carbide precipitation and the development of slip bands caused by planar gliding of dislocations through κ-carbide shearing. The spacing among slip bands then became coarse with an increase in the Al and C contents, resulting from the coarsening of κ-carbide. Meanwhile, dynamic strain aging (DSA) behavior was observed in all alloys deformed at 500 °C. This occurred because the hot tensile tests were carried out under a high strain rate condition; therefore, the mobility of the dislocations was fast and thus solute atoms pinned the dislocations despite deformation at a high temperature. With a coarsening of κ-carbide, the extent of serration was reduced, resulted from the fact that the content of solute C decreased due to the greater precipitation of κ-carbide; i.e., the amounts of solute C atoms to cause the DSA behavior were reduced. © 2023 Elsevier B.V. | - |
dc.language | English | - |
dc.publisher | Elsevier BV | - |
dc.title | Influence of microstructure evolution on hot ductility behavior of austenitic Fe–Mn–Al–C lightweight steels during hot tensile deformation | - |
dc.type | Article | - |
dc.identifier.doi | 10.1016/j.msea.2023.144786 | - |
dc.identifier.wosid | 001010947200001 | - |
dc.identifier.scopusid | 2-s2.0-85148078691 | - |
dc.identifier.bibliographicCitation | Materials Science and Engineering: A, v.868 | - |
dc.description.isOpenAccess | FALSE | - |
dc.subject.keywordAuthor | Atom probe tomography (APT) | - |
dc.subject.keywordAuthor | Hot ductility | - |
dc.subject.keywordAuthor | Lightweight steel | - |
dc.subject.keywordAuthor | Slip band | - |
dc.subject.keywordAuthor | κ-carbide | - |
dc.subject.keywordPlus | MECHANICAL-PROPERTIES | - |
dc.subject.keywordPlus | DISLOCATION SUBSTRUCTURE | - |
dc.subject.keywordPlus | HIGH-STRENGTH | - |
dc.subject.keywordPlus | PRECIPITATION | - |
dc.subject.keywordPlus | PLASTICITY | - |
dc.subject.keywordPlus | CRACKING | - |
dc.subject.keywordPlus | MO | - |
dc.subject.keywordPlus | SI | - |
dc.citation.title | Materials Science and Engineering: A | - |
dc.citation.volume | 868 | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.relation.journalResearchArea | Science & Technology - Other Topics; Materials Science; Metallurgy & Metallurgical Engineering | - |
dc.relation.journalWebOfScienceCategory | Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering | - |
dc.type.docType | Article | - |
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