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DC Field | Value | Language |
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dc.contributor.author | Keerti, S | - |
dc.contributor.author | Yang, X | - |
dc.contributor.author | Babu, NH | - |
dc.date.accessioned | 2025-07-10T06:45:18Z | - |
dc.date.available | 2025-07-10T06:45:18Z | - |
dc.date.issued | 2025-07-04 | - |
dc.identifier | ORCiD: Xinliang Yang https://orcid.org/0000-0002-7657-3759 | - |
dc.identifier | ORCiD: Nadendla Hari Babu https://orcid.org/0000-0003-4894-7052 | - |
dc.identifier | Article number: 148764 | - |
dc.identifier.citation | Keerti, 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.issn | 0921-5093 | - |
dc.identifier.uri | https://bura.brunel.ac.uk/handle/2438/31523 | - |
dc.description | Data availability: Data will be made available on request. | en_US |
dc.description.abstract | The 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.sponsorship | The authors wish to acknowledge financial support from the Engineering and Physical Sciences Research Council project (EP/Y025016/1). | en_US |
dc.format.extent | 1 - 13 | - |
dc.format.medium | Print-Electronic | - |
dc.language | English | - |
dc.language.iso | en_US | en_US |
dc.publisher | Elsevier | en_US |
dc.rights | The Authors | - |
dc.rights | Creative Commons Attribution 4.0 International | - |
dc.rights.uri | https://creativecommons.org/licenses/by/4.0/ | - |
dc.subject | Hall-Petch relation | en_US |
dc.subject | Al binary alloys | en_US |
dc.subject | eutectic | en_US |
dc.subject | perimeter | en_US |
dc.subject | interfacial area | en_US |
dc.title | A generic Hall-Petch relationship in metallic materials with varied grain morphology | en_US |
dc.type | Article | en_US |
dc.date.dateAccepted | 2025-07-03 | - |
dc.identifier.doi | https://doi.org/10.1016/j.msea.2025.148764 | - |
dc.relation.isPartOf | Materials Science and Engineering: A | - |
pubs.publication-status | Published | - |
pubs.volume | 943 | - |
dc.identifier.eissn | 1873-4936 | - |
dc.rights.license | https://creativecommons.org/licenses/by/4.0/legalcode.en | - |
dcterms.dateAccepted | 2025-07-03 | - |
Appears in Collections: | Brunel Centre for Advanced Solidification Technology (BCAST) |
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FullText.pdf | Copyright © 2025 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY license ( https://creativecommons.org/licenses/by/4.0/ ). | 13.93 MB | Adobe PDF | View/Open |
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