Effects of Growth Rates and Compositions on Dendrite Arm Spacings in Directionally Solidified Al-Zn Alloys

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dc.contributor.authorAcer E.
dc.contributor.authorÇadırlı E.
dc.contributor.authorErol H.
dc.contributor.authorKaya H.
dc.contributor.authorGündüz M.
dc.date.accessioned2019-08-01T13:38:39Z
dc.date.available2019-08-01T13:38:39Z
dc.date.issued2017
dc.departmentNiğde ÖHÜ
dc.description.abstractDendritic spacing can affect microsegregation profiles and also the formation of secondary phases within interdendritic regions, which influences the mechanical properties of cast structures. To understand dendritic spacings, it is important to understand the effects of growth rate and composition on primary dendrite arm spacing (?1) and secondary dendrite arm spacing (?2). In this study, aluminum alloys with concentrations of (1, 3, and 5 wt pct) Zn were directionally solidified upwards using a Bridgman-type directional solidification apparatus under a constant temperature gradient (10.3 K/mm), resulting in a wide range of growth rates (8.3–165.0 µm/s). Microstructural parameters, ?1 and ?2 were measured and expressed as functions of growth rate and composition using a linear regression analysis method. The values of ?1 and ?2 decreased with increasing growth rates. However, the values of ?1 increased with increasing concentration of Zn in the Al-Zn alloy, but the values of ?2 decreased systematically with an increased Zn concentration. In addition, a transition from a cellular to a dendritic structure was observed at a relatively low growth rate (16.5 µm/s) in this study of binary alloys. The experimental results were compared with predictive theoretical models as well as experimental works for dendritic spacing. © 2017, The Minerals, Metals & Materials Society and ASM International.
dc.description.sponsorshipFirat University Scientific Research Projects Management Unit
dc.description.sponsorshipThis project was supported by the Erciyes University Scientific Research Project Unit under Contract No: FBD-12-3978. The authors are grateful for this financial support.
dc.identifier.doi10.1007/s11661-017-4337-x
dc.identifier.endpage5923
dc.identifier.issn1073-5623
dc.identifier.issue12
dc.identifier.scopus2-s2.0-85030329205
dc.identifier.scopusqualityQ1
dc.identifier.startpage5911
dc.identifier.urihttps://dx.doi.org/10.1007/s11661-017-4337-x
dc.identifier.urihttps://hdl.handle.net/11480/1768
dc.identifier.volume48
dc.identifier.wosWOS:000426864300015
dc.identifier.wosqualityQ2
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.institutionauthor[0-Belirlenecek]
dc.language.isoen
dc.publisherSpringer Boston
dc.relation.ispartofMetallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.titleEffects of Growth Rates and Compositions on Dendrite Arm Spacings in Directionally Solidified Al-Zn Alloys
dc.typeArticle

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