Please use this identifier to cite or link to this item: http://bura.brunel.ac.uk/handle/2438/31523
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dc.contributor.authorKeerti, S-
dc.contributor.authorYang, X-
dc.contributor.authorBabu, NH-
dc.date.accessioned2025-07-10T06:45:18Z-
dc.date.available2025-07-10T06:45:18Z-
dc.date.issued2025-07-04-
dc.identifierORCiD: Xinliang Yang https://orcid.org/0000-0002-7657-3759-
dc.identifierORCiD: Nadendla Hari Babu https://orcid.org/0000-0003-4894-7052-
dc.identifierArticle number: 148764-
dc.identifier.citationKeerti, S., Yang, X. and Babu, N.H. (2025) 'A generic Hall-Petch relationship in metallic materials with varied grain morphology', Materials Science and Engineering: A, 943, 148764, pp. 1- 13. doi: 10.1016/j.msea.2025.148764.en_US
dc.identifier.issn0921-5093-
dc.identifier.urihttps://bura.brunel.ac.uk/handle/2438/31523-
dc.descriptionData availability: Data will be made available on request.en_US
dc.description.abstractThe Hall-Petch relationship relates the yield strength (YS) of metallic materials to grain diameter (d), but for alloys with dendritic grains, secondary dendritic arm spacing (λ2) provides a better fit. This manuscript underscores the significance of considering a perimeter-associated parameter (p'), rather than relying solely on d or λ2, to account for strength contribution from morphological changes in various alloys. We propose a generic Hall-Petch relation expressed as σ = σ<inf>o</inf> + k'ʹ/√pʹ, where p' is the area per unit perimeter which can be accurately measured using digital imaging tools and k'ʹ is the Hall-Petch constant. To validate this approach, controlled solidification experiments were conducted on Al-Si and Al-Ce alloys across cooling rates from 0.000167 °C/s to 0.34 °C/s. The degree of primary α-Al grain complexity was manipulated through solute additions (Si or Ce), revealing a nonlinear relationship between λ2 and p', both experimentally and theoretically. This underscores the critical importance of incorporating the perimeter-associated parameter p' as a fundamental strength metric in the Hall-Petch relation. Hardness changes were analysed alongside evolving grain morphologies. Experimental data from various morphologies (facetted, rosette, dendritic) fit more effectively with the proposed generic Hall-Petch relationship than conventional models.en_US
dc.description.sponsorshipThe authors wish to acknowledge financial support from the Engineering and Physical Sciences Research Council project (EP/Y025016/1).en_US
dc.format.extent1 - 13-
dc.format.mediumPrint-Electronic-
dc.languageEnglish-
dc.language.isoen_USen_US
dc.publisherElsevieren_US
dc.rightsThe Authors-
dc.rightsCreative Commons Attribution 4.0 International-
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/-
dc.subjectHall-Petch relationen_US
dc.subjectAl binary alloysen_US
dc.subjecteutecticen_US
dc.subjectperimeteren_US
dc.subjectinterfacial areaen_US
dc.titleA generic Hall-Petch relationship in metallic materials with varied grain morphologyen_US
dc.typeArticleen_US
dc.date.dateAccepted2025-07-03-
dc.identifier.doihttps://doi.org/10.1016/j.msea.2025.148764-
dc.relation.isPartOfMaterials Science and Engineering: A-
pubs.publication-statusPublished-
pubs.volume943-
dc.identifier.eissn1873-4936-
dc.rights.licensehttps://creativecommons.org/licenses/by/4.0/legalcode.en-
dcterms.dateAccepted2025-07-03-
Appears in Collections:Brunel Centre for Advanced Solidification Technology (BCAST)

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