Bimodality of incipient plastic strength in face-centered cubic high-entropy alloys
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Zhao, Yakai | - |
dc.contributor.author | Park, Jeong-Min | - |
dc.contributor.author | Jang, Jae-il | - |
dc.contributor.author | Ramamurty, Upadrasta | - |
dc.date.accessioned | 2021-07-30T04:50:36Z | - |
dc.date.available | 2021-07-30T04:50:36Z | - |
dc.date.created | 2021-05-12 | - |
dc.date.issued | 2021-01 | - |
dc.identifier.issn | 1359-6454 | - |
dc.identifier.uri | https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/1618 | - |
dc.description.abstract | Spherical tip nanoindentation experiments on two typical face-centered cubic high-entropy alloys (HEAs), CoCrFeNi and CoCrFeMnNi in as-solutionized and aged conditions were performed using tips of two different radii. Large datasets of the strength at the first pop-in were obtained and their statistical nature were analyzed to gain insights into the micromechanisms responsible for the onset of incipient plasticity in HEAs that are notionally monophasic. In all the cases examined, the probability density distributions were bimodal in nature. The deconvoluted distributions were utilized to estimate the activation volumes of the underlying deformation mechanisms. They show that when the probed material's volume is relatively small, heterogeneous dislocation nucleation aided by monovacancies occurs at lower indentation stresses; this followed by homogeneous dislocation nucleation at high loads, resulting in strengths corresponding to the theoretical strengths. When a substantially larger volume is sampled, by using a larger radius tip, either the preexisting dislocation mediated ones at low stresses or vacancy cluster/grain boundary aided heterogeneous dislocations nucleation at higher stresses become dominant. Increasing the chemical short-range order in the alloy via high temperature aging leads to overall strengthening of the alloy by enhancing stress required for the homogeneous dislocation nucleation. Implications of such plurality of mechanisms with overlapping strength distributions at HEA's disposal in imparting high strength-ductility combinations are discussed. | - |
dc.language | 영어 | - |
dc.language.iso | en | - |
dc.publisher | PERGAMON-ELSEVIER SCIENCE LTD | - |
dc.title | Bimodality of incipient plastic strength in face-centered cubic high-entropy alloys | - |
dc.type | Article | - |
dc.contributor.affiliatedAuthor | Jang, Jae-il | - |
dc.identifier.doi | 10.1016/j.actamat.2020.10.066 | - |
dc.identifier.scopusid | 2-s2.0-85095414763 | - |
dc.identifier.wosid | 000599842800011 | - |
dc.identifier.bibliographicCitation | ACTA MATERIALIA, v.202, pp.124 - 134 | - |
dc.relation.isPartOf | ACTA MATERIALIA | - |
dc.citation.title | ACTA MATERIALIA | - |
dc.citation.volume | 202 | - |
dc.citation.startPage | 124 | - |
dc.citation.endPage | 134 | - |
dc.type.rims | ART | - |
dc.type.docType | Article | - |
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 | SHORT-RANGE ORDER | - |
dc.subject.keywordPlus | DISLOCATION NUCLEATION | - |
dc.subject.keywordPlus | MECHANICAL-PROPERTIES | - |
dc.subject.keywordPlus | SIZE DEPENDENCE | - |
dc.subject.keywordPlus | NANOINDENTATION | - |
dc.subject.keywordPlus | DEFORMATION | - |
dc.subject.keywordPlus | BEHAVIOR | - |
dc.subject.keywordPlus | CRYSTALS | - |
dc.subject.keywordPlus | HYDROGEN | - |
dc.subject.keywordPlus | NI3AL | - |
dc.subject.keywordAuthor | High-entropy alloy | - |
dc.subject.keywordAuthor | nanoindentation | - |
dc.subject.keywordAuthor | pop-in | - |
dc.subject.keywordAuthor | statistical analysis | - |
dc.subject.keywordAuthor | short-range ordering | - |
dc.identifier.url | https://www.sciencedirect.com/science/article/pii/S1359645420308648?via%3Dihub | - |
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.
222, Wangsimni-ro, Seongdong-gu, Seoul, 04763, Korea+82-2-2220-1365
COPYRIGHT © 2021 HANYANG UNIVERSITY.
Certain data included herein are derived from the © Web of Science of Clarivate Analytics. All rights reserved.
You may not copy or re-distribute this material in whole or in part without the prior written consent of Clarivate Analytics.