Effect of solid-solution strengthening on deformation mechanisms and strain hardening in medium-entropy V1-xCrxCoNi alloys
DC Field | Value | Language |
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dc.contributor.author | Chung, Hyun | - |
dc.contributor.author | Kim, Dae Woong | - |
dc.contributor.author | Cho, Woo Jin | - |
dc.contributor.author | Han, Heung Nam | - |
dc.contributor.author | Ikeda, Yuji | - |
dc.contributor.author | Ishibashi, Shoji | - |
dc.contributor.author | Kormann, Fritz | - |
dc.contributor.author | Sohn, Seok Su | - |
dc.date.accessioned | 2022-05-17T02:42:51Z | - |
dc.date.available | 2022-05-17T02:42:51Z | - |
dc.date.created | 2022-05-17 | - |
dc.date.issued | 2022-05-10 | - |
dc.identifier.issn | 1005-0302 | - |
dc.identifier.uri | https://scholar.korea.ac.kr/handle/2021.sw.korea/141079 | - |
dc.description.abstract | High- and medium-entropy alloys (HEAs and MEAs) possess high solid-solution strength. Numerous investigations have been conducted on its impact on yield strength, however, there are limited reports regarding the relation between solid-solution strengthening and strain-hardening rate. In addition, no attempt has been made to account for the dislocation-mediated plasticity; most works focused on twinning- or transformation-induced plasticity (TWIP or TRIP). In this work we reveal the role of solidsolution strengthening on the strain-hardening rate via systematically investigating evolutions of deformation structures by controlling the Cr/V ratio in prototypical V 1- x Cr x CoNi alloys. Comparing the TWIP of CrCoNi with the dislocation slip of V 0.4 Cr 0.6 CoNi, the hardening rate of CrCoNi was superior to slip-band refinements of V 0.4 Cr 0.6 CoNi due to the dynamic Hall-Petch effect. However, as V content increased further to V 0.7 Cr 0.3 CoNi and VCoNi, their rate of slip-band refinement in V 0.7 Cr 0.3 CoNi and VCoNi with high solid-solution strength surpassed that of CrCoNi. Although it is generally accepted in conventional alloys that deformation twinning results in a higher strain-hardening rate than dislocation-mediated plasticity, we observed that the latter can be predominant in the former under an activated huge solid-solution strengthening effect. The high solid-solution strength lowered the cross-slip activation and consequently retarded the dislocation rearrangement rate, i.e., the dynamic recovery. This delay in the hardening rate decrease, therefore, increased the strain-hardening rate, results in an overall higher strain-hardening rate of V -rich alloys. (c) 2022 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology. | - |
dc.language | English | - |
dc.language.iso | en | - |
dc.publisher | JOURNAL MATER SCI TECHNOL | - |
dc.subject | STACKING-FAULT ENERGY | - |
dc.subject | SHORT-RANGE ORDER | - |
dc.subject | MICROSTRUCTURAL EVOLUTION | - |
dc.subject | FCC | - |
dc.subject | DISLOCATION | - |
dc.subject | TEMPERATURE | - |
dc.subject | BEHAVIOR | - |
dc.subject | STRESS | - |
dc.subject | STATE | - |
dc.subject | SLIP | - |
dc.title | Effect of solid-solution strengthening on deformation mechanisms and strain hardening in medium-entropy V1-xCrxCoNi alloys | - |
dc.type | Article | - |
dc.contributor.affiliatedAuthor | Sohn, Seok Su | - |
dc.identifier.doi | 10.1016/j.jmst.2021.07.042 | - |
dc.identifier.scopusid | 2-s2.0-85118864514 | - |
dc.identifier.wosid | 000787611300001 | - |
dc.identifier.bibliographicCitation | JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY, v.108, pp.270 - 280 | - |
dc.relation.isPartOf | JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY | - |
dc.citation.title | JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY | - |
dc.citation.volume | 108 | - |
dc.citation.startPage | 270 | - |
dc.citation.endPage | 280 | - |
dc.type.rims | ART | - |
dc.type.docType | Article | - |
dc.description.journalClass | 1 | - |
dc.description.isOpenAccess | Y | - |
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 | STACKING-FAULT ENERGY | - |
dc.subject.keywordPlus | SHORT-RANGE ORDER | - |
dc.subject.keywordPlus | MICROSTRUCTURAL EVOLUTION | - |
dc.subject.keywordPlus | FCC | - |
dc.subject.keywordPlus | DISLOCATION | - |
dc.subject.keywordPlus | TEMPERATURE | - |
dc.subject.keywordPlus | BEHAVIOR | - |
dc.subject.keywordPlus | STRESS | - |
dc.subject.keywordPlus | STATE | - |
dc.subject.keywordPlus | SLIP | - |
dc.subject.keywordAuthor | Medium-entropy alloy | - |
dc.subject.keywordAuthor | Tensile property | - |
dc.subject.keywordAuthor | Solid-solution strength | - |
dc.subject.keywordAuthor | Strain-hardening rate | - |
dc.subject.keywordAuthor | Stacking fault energy | - |
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