Abnormal grain growth in ultrafine grained Ni under high-cycle loading

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dc.contributor.authorBarrios, Alejandro
dc.contributor.authorZhang, Yin
dc.contributor.authorMaeder, Xavier
dc.contributor.authorCastelluccio, Gustavo M.
dc.contributor.authorPierron, Olivier
dc.contributor.authorZhu, Ting
dc.date.accessioned2021-12-07T10:22:02Z
dc.date.available2021-12-07T10:22:02Z
dc.date.issued2021-11-02
dc.description.abstractAbnormal grain growth can occur in polycrystalline materials with only a fraction of grains growing drastically to consume other grains. Here we report abnormal grain growth in ultrafine grained metal in a rarely explored high-cycle loading regime at ambient temperature. Abnormal grain growth is observed in electroplated Ni microbeams with average initial grain sizes less than 640 nm under a large number of loading cycles (up to 109) with low strain amplitudes (< 0.3%). Such abnormal grain growth occurs predominantly in the family of grains whose <100> orientation is along the tensile/compressive loading direction. Micromechanics analysis suggests that the elastic anisotropy of grains dictates the thermodynamic driving force of abnormal grain growth, such that the lowest strain energy density of the <100> oriented grain family dominates grain growth. This work unveils a unique type of abnormal grain growth that may be harnessed to tailor grain microstructures in materials.en_UK
dc.identifier.citationBarrios A, Zhang Y, Maeder X, et al., (2022) Abnormal grain growth in ultrafine grained Ni under high-cycle loading, Scripta Materialia, Volume 209, March 2022, Article number 114372en_UK
dc.identifier.issn1359-6462
dc.identifier.urihttps://doi.org/10.1016/j.scriptamat.2021.114372
dc.identifier.urihttps://dspace.lib.cranfield.ac.uk/handle/1826/17314
dc.language.isoenen_UK
dc.publisherElsevieren_UK
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/*
dc.subjectAbnormal grain growthen_UK
dc.subjectHigh-cycle loadingen_UK
dc.subjectMicromechanicsen_UK
dc.subjectUltrafine grained metalen_UK
dc.titleAbnormal grain growth in ultrafine grained Ni under high-cycle loadingen_UK
dc.typeArticleen_UK

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