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dc.contributor.authorKhodabakhshi, Farzad
dc.contributor.authorGerlich, Adrian P. 19:33:07 (GMT) 19:33:07 (GMT)
dc.descriptionThe final publication is available at Elsevier via http:/ © 2018. This manuscript version is made available under the CC-BY-NC-ND 4.0 license
dc.description.abstractA novel severe plastic deformation (SPD) process termed accumulative fold forging (AFF) is introduced to fabricate a homogenous ultra-fine grained (UFG) layered metal structure by repetitive folding and forging aluminum alloy foil. The present work studies AFF applied to thin foils of AA8006 Al-Fe-Mn aluminum alloy after 26 folding steps to produce a UFG structure containing 67,108,864 layers across a 2mm thickness. The structure of the layers and grain refinement are studied using X-ray diffraction (XRD), field-emission scanning electron microscopy (FE-SEM) and scanning-transmission electron microscopy (STEM) analysis. The results indicate a well-bonded inter-layer structure with an average grain size of about 200nm parallel and 250nm perpendicular to the forging direction, while dislocation density increased to ~7.2×1015m−2 following AFF. The mechanical strength of the aluminum foil is evaluated in the terms of indentation hardness testing before and after AFF process. The processed UFGed layered material exhibited an average hardness value of ~61.5 Vickers as compared to the initial value of ~30.4 Vickers for the annealed foil alloy, which indicates an improvement of ~100% due to the contributions of grain refinement, work hardening and interfacial strengthening of the bonded layers.en
dc.description.sponsorshipNatural Sciences and Engineering Research Council of Canada (NSERC)en
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 International*
dc.subjectAA8006 alloyen
dc.subjectAccumulative fold forging (AFF)en
dc.subjectAluminum foilen
dc.subjectIndentation hardnessen
dc.subjectSevere plastic deformation (SPD)en
dc.subjectUltra-fine grained (UFG)en
dc.titleAccumulative fold-forging (AFF) as a novel severe plastic deformation process to fabricate a high strength ultra-fine grained layered aluminum alloy structureen
dcterms.bibliographicCitationKhodabakhshi, F., & Gerlich, A. P. (2018). Accumulative fold-forging (AFF) as a novel severe plastic deformation process to fabricate a high strength ultra-fine grained layered aluminum alloy structure. Materials Characterization, 136, 229–239.
uws.contributor.affiliation1Faculty of Engineeringen
uws.contributor.affiliation2Mechanical and Mechatronics Engineeringen

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