Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/163478
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dc.contributor.authorJi, Weimingen_US
dc.contributor.authorWu, Mao Seeen_US
dc.date.accessioned2022-12-07T05:40:58Z-
dc.date.available2022-12-07T05:40:58Z-
dc.date.issued2022-
dc.identifier.citationJi, W. & Wu, M. S. (2022). Inhibiting the inverse Hall-Petch behavior in CoCuFeNiPd high-entropy alloys with short-range ordering and grain boundary segregation. Scripta Materialia, 221, 114950-. https://dx.doi.org/10.1016/j.scriptamat.2022.114950en_US
dc.identifier.issn1359-6462en_US
dc.identifier.urihttps://hdl.handle.net/10356/163478-
dc.description.abstractThe mechanical implications of short-range ordering (SRO) and grain boundary (GB) segregation in the inverse Hall-Petch behavior of nanocrystalline CoCuFeNiPd high-entropy alloys (HEAs) were studied using hybrid Monte Carlo (MC)/Molecular Dynamics (MD) simulations. Results show that the presences of SRO and GB segregation inhibit the grain size softening (inverse Hall-Petch relation), leading to grain-size independence of the high flow stress. We find that the dislocation nucleation at triple junctions is suppressed by the SRO due to the increased stacking fault energy, which attenuates the dislocation activities. Furthermore, the strain localization at GBs is intensified by the GB segregation due to the increased GB energy, which facilitates the GB activities and glass-like deformation. The GB-governed plasticity associated with glass-like deformation leads to suppression of the inverse Hall-Petch effect. These findings may provide useful strategies for the design of high-performance HEAs by tuning the GB composition and SRO structure.en_US
dc.description.sponsorshipMinistry of Education (MOE)en_US
dc.language.isoenen_US
dc.relationRG155/19 (S)en_US
dc.relation.ispartofScripta Materialiaen_US
dc.relation.uridoi:10.21979/N9/DG1D4Hen_US
dc.rights© 2022 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.en_US
dc.subjectEngineering::Mechanical engineeringen_US
dc.titleInhibiting the inverse Hall-Petch behavior in CoCuFeNiPd high-entropy alloys with short-range ordering and grain boundary segregationen_US
dc.typeJournal Articleen
dc.contributor.schoolSchool of Mechanical and Aerospace Engineeringen_US
dc.identifier.doi10.1016/j.scriptamat.2022.114950-
dc.identifier.scopus2-s2.0-85135155652-
dc.identifier.volume221en_US
dc.identifier.spage114950en_US
dc.subject.keywordsHigh-Entropy Alloysen_US
dc.subject.keywordsShort-Range Orderingen_US
dc.description.acknowledgementThis research is supported by the Ministry of Education, Singapore, under its Academic Research Fund Tier 1, Project No. RG155/19 (S).en_US
item.fulltextNo Fulltext-
item.grantfulltextnone-
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