Cryogenic-temperature fracture toughness analysis of non-equi-atomic V10Cr10Fe45Co20Ni15 high-entropy alloy
DC Field | Value | Language |
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dc.contributor.author | Jo, Yong Hee | - |
dc.contributor.author | Doh, Kyung-Yeon | - |
dc.contributor.author | Kim, Dong Geun | - |
dc.contributor.author | Lee, Kwanho | - |
dc.contributor.author | Kim, Dae Woong | - |
dc.contributor.author | Sung, Hyokyung | - |
dc.contributor.author | Sohn, Seok Su | - |
dc.contributor.author | Lee, Donghwa | - |
dc.contributor.author | Kim, Hyoung Seop | - |
dc.contributor.author | Lee, Byeong-Joo | - |
dc.contributor.author | Lee, Sunghak | - |
dc.date.accessioned | 2021-08-31T23:05:55Z | - |
dc.date.available | 2021-08-31T23:05:55Z | - |
dc.date.created | 2021-06-18 | - |
dc.date.issued | 2019-11-15 | - |
dc.identifier.issn | 0925-8388 | - |
dc.identifier.uri | https://scholar.korea.ac.kr/handle/2021.sw.korea/61583 | - |
dc.description.abstract | Representative face-centered-cubic (FCC) high-entropy alloys (HEAs) or medium-entropy alloys (MEAs), e.g., equi-atomic CoCrFeMnNi or CrCoNi alloys, have drawn many attentions due to the excellent damage-tolerance at cryogenic temperature. The investigation of fracture toughness at 77 K is basically required for the reliable evaluation of high-performance alloys used for cryogenic applications; however, it has been rarely carried out for the non-equi-atomic FCC HEAs yet. In this study, tensile and fracture toughness tests were conducted on the non-equi-atomic V10Cr10Fe45Co20Ni15 alloy, and the results were compared with those of the equi-atomic CoCrFeMnNi and CrCoNi alloys. The present alloy shows a good damage tolerance at cryogenic temperature with tensile strength of 1 GPa and elongation of similar to 60%. The K-JIc fracture toughness values are 219 and 232 MPam(1/2) at 298 and 77 K, respectively, showing the increase in toughness with decreasing temperature. This increase results from the absence of twins at 298 K and the increased propensity to twin formation at 77 K, which is well confirmed by the variation of stacking fault energies (SFEs) by using Ab-initio calculations. The mechanical properties of the present alloy are actually similar or slightly lower than those of the other CoNiCr or FeMnCoNiCr alloy; instead, this study provides that neither composition nor certain elements are the most important factors dictating damage-tolerance of HEAs or MEAs. (C) 2019 Elsevier B.V. All rights reserved. | - |
dc.language | English | - |
dc.language.iso | en | - |
dc.publisher | ELSEVIER SCIENCE SA | - |
dc.subject | STACKING-FAULT ENERGY | - |
dc.subject | MECHANICAL-PROPERTIES | - |
dc.subject | TENSILE PROPERTIES | - |
dc.subject | IMPACT TOUGHNESS | - |
dc.subject | ELASTIC-MODULI | - |
dc.subject | MICROSTRUCTURE | - |
dc.subject | PHASE | - |
dc.subject | EXPANSION | - |
dc.subject | BEHAVIOR | - |
dc.subject | DEPENDENCE | - |
dc.title | Cryogenic-temperature fracture toughness analysis of non-equi-atomic V10Cr10Fe45Co20Ni15 high-entropy alloy | - |
dc.type | Article | - |
dc.contributor.affiliatedAuthor | Sohn, Seok Su | - |
dc.identifier.doi | 10.1016/j.jallcom.2019.151864 | - |
dc.identifier.scopusid | 2-s2.0-85070632696 | - |
dc.identifier.wosid | 000483698900012 | - |
dc.identifier.bibliographicCitation | JOURNAL OF ALLOYS AND COMPOUNDS, v.809 | - |
dc.relation.isPartOf | JOURNAL OF ALLOYS AND COMPOUNDS | - |
dc.citation.title | JOURNAL OF ALLOYS AND COMPOUNDS | - |
dc.citation.volume | 809 | - |
dc.type.rims | ART | - |
dc.type.docType | Article | - |
dc.description.journalClass | 1 | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.relation.journalResearchArea | Chemistry | - |
dc.relation.journalResearchArea | Materials Science | - |
dc.relation.journalResearchArea | Metallurgy & Metallurgical Engineering | - |
dc.relation.journalWebOfScienceCategory | Chemistry, Physical | - |
dc.relation.journalWebOfScienceCategory | Materials Science, Multidisciplinary | - |
dc.relation.journalWebOfScienceCategory | Metallurgy & Metallurgical Engineering | - |
dc.subject.keywordPlus | STACKING-FAULT ENERGY | - |
dc.subject.keywordPlus | MECHANICAL-PROPERTIES | - |
dc.subject.keywordPlus | TENSILE PROPERTIES | - |
dc.subject.keywordPlus | IMPACT TOUGHNESS | - |
dc.subject.keywordPlus | ELASTIC-MODULI | - |
dc.subject.keywordPlus | MICROSTRUCTURE | - |
dc.subject.keywordPlus | PHASE | - |
dc.subject.keywordPlus | EXPANSION | - |
dc.subject.keywordPlus | BEHAVIOR | - |
dc.subject.keywordPlus | DEPENDENCE | - |
dc.subject.keywordAuthor | High-entropy alloy (HEA) | - |
dc.subject.keywordAuthor | Fracture toughness | - |
dc.subject.keywordAuthor | Cryogenic temperature | - |
dc.subject.keywordAuthor | Stacking fault energy (SFE) | - |
dc.subject.keywordAuthor | Ab-initio calculation | - |
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