DC Field | Value | Language |
---|---|---|
dc.contributor.author | Hwangbo, Seung | - |
dc.contributor.author | Lee, Hong-Bum | - |
dc.contributor.author | Song, Young-Beum | - |
dc.contributor.author | Ham, Jinhee | - |
dc.contributor.author | Kim, Hong-Kyu | - |
dc.contributor.author | Suh, Dong-Woo | - |
dc.date.accessioned | 2019-12-02T12:10:21Z | - |
dc.date.available | 2019-12-02T12:10:21Z | - |
dc.date.created | 2019-06-19 | - |
dc.date.issued | 2019-06 | - |
dc.identifier.issn | 1738-8228 | - |
dc.identifier.uri | https://oasis.postech.ac.kr/handle/2014.oak/100081 | - |
dc.description.abstract | The effect of carbon content and isothermal heat treatment conditions on the microstructure evolution and mechanical properties of ultra-high strength bainitic steels was investigated. A reduction in carbon content from 0.8 wt% to 0.6 wt% in super-bainite steel with typical chemistry effectively improved not only the Charpy impact toughness but also the strength level. This suggests that reducing the carbon content is a very promising way to obtain better mechanical balance between strength and impact toughness. The higher Charpy impact toughness at a lower carbon content of 0.6 wt% is thought to result from a reduction in austenite fraction, and refinement of the austenite grain. The coarse austenite grains have a detrimental effect on impact toughness, by prematurely transforming to deformation-induced martensite during crack propagation. Mechanical properties were also affected by the isothermal treatment temperature. The lower isothermal temperature enhanced the formation of bainitic ferrite with a refined microstructure, which has a beneficial influence on strength, but reduces impact toughness. The lower impact toughness at lower isothermal temperature is attributed to the sluggish redistribution of carbon from the bainitic ferrite into the surrounding austenite. Higher solute carbon in the bainitic ferrite contributes to an increase of strength, but at the same time, encourages a propensity to cleavage fracture. | - |
dc.language | Korean | - |
dc.publisher | KOREAN INST METALS MATERIALS | - |
dc.relation.isPartOf | KOREAN JOURNAL OF METALS AND MATERIALS | - |
dc.title | Influence of Carbon Content and Isothermal Heat Treatment Temperature on the Microstructure and Mechanical Properties of Ultra-High Strength Bainitic Steels | - |
dc.type | Article | - |
dc.identifier.doi | 10.3365/KJMM.2019.57.6.335 | - |
dc.type.rims | ART | - |
dc.identifier.bibliographicCitation | KOREAN JOURNAL OF METALS AND MATERIALS, v.57, no.6, pp.335 - 342 | - |
dc.identifier.kciid | ART002469085 | - |
dc.identifier.wosid | 000469945100001 | - |
dc.citation.endPage | 342 | - |
dc.citation.number | 6 | - |
dc.citation.startPage | 335 | - |
dc.citation.title | KOREAN JOURNAL OF METALS AND MATERIALS | - |
dc.citation.volume | 57 | - |
dc.contributor.affiliatedAuthor | Lee, Hong-Bum | - |
dc.contributor.affiliatedAuthor | Suh, Dong-Woo | - |
dc.identifier.scopusid | 2-s2.0-85068566809 | - |
dc.description.journalClass | 1 | - |
dc.description.journalClass | 1 | - |
dc.description.isOpenAccess | Y | - |
dc.type.docType | Article | - |
dc.subject.keywordPlus | RETAINED AUSTENITE | - |
dc.subject.keywordPlus | ALLOYING ELEMENTS | - |
dc.subject.keywordPlus | SILICON STEELS | - |
dc.subject.keywordPlus | TRANSFORMATION | - |
dc.subject.keywordPlus | SUPERSATURATION | - |
dc.subject.keywordPlus | KINETICS | - |
dc.subject.keywordPlus | FERRITE | - |
dc.subject.keywordPlus | TOUGHNESS | - |
dc.subject.keywordPlus | STABILITY | - |
dc.subject.keywordPlus | DUCTILITY | - |
dc.subject.keywordAuthor | high strength | - |
dc.subject.keywordAuthor | bainitic ferrite | - |
dc.subject.keywordAuthor | heat treatment | - |
dc.subject.keywordAuthor | austenite | - |
dc.subject.keywordAuthor | impact toughness | - |
dc.relation.journalWebOfScienceCategory | Materials Science, Multidisciplinary | - |
dc.relation.journalWebOfScienceCategory | Metallurgy & Metallurgical Engineering | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.description.journalRegisteredClass | kci | - |
dc.relation.journalResearchArea | Materials Science | - |
dc.relation.journalResearchArea | Metallurgy & Metallurgical Engineering | - |
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.
library@postech.ac.kr Tel: 054-279-2548
Copyrights © by 2017 Pohang University of Science ad Technology All right reserved.