Effect of growth rates and temperature gradients on the spacing and undercooling in the broken-lamellar eutectic growth (Sn-Zn eutectic system)

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dc.contributor.authorKaya, H
dc.contributor.authorCadirli, E
dc.contributor.authorGunduz, M
dc.date.accessioned2019-08-01T13:38:39Z
dc.date.available2019-08-01T13:38:39Z
dc.date.issued2003
dc.departmentNiğde ÖHÜ
dc.description.abstractThe Sn-Zn system has a eutectic structure of a broken lamellar type. Dependence of the broken-lamellar spacing lambda and the undercooling DeltaT on V and G were investigated, and the relationship between them was examined. A Sn-Zn (99.99%) high-purity eutectic alloy was melted in a graphite crucible under vacuum atmosphere. This eutectic alloy was directionally solidified upward with a constant growth rate V (8.30 mum/s) and different temperature gradients G (1.86-6.52 K/mm), and also with a constant temperature gradient (6.52 K/mm) and different growth rates (8.30-165.13 mum/s) in a Bridgman-type directional solidification furnace. The lamellar spacings lambda were measured from both transverse and longitudinal sections of the specimen. The lambda values from the transverse section were used for calculations and comparisons with the previous works. The undercooling values DeltaT were obtained using growth rate and system parameters K-1 and K-2. It was found that the values of lambda decreased while V and G increased. The relationships between lamellar spacing lambda and solidification parameters V and G were obtained by linear regression analysis method. The lambda(2)V, DeltaTlambda, DeltaTV(-0.5), and lambda(3)G values were determined using lambda, DeltaT, V, and G values. The experimentally obtained values for the broken-lamellar growth (Sn-Zn eutectic system) were in good agreement with the theoretical and other experimental values.
dc.identifier.doi10.1361/105994903770343024
dc.identifier.endpage469
dc.identifier.issn1059-9495
dc.identifier.issue4
dc.identifier.scopus2-s2.0-0042820002
dc.identifier.scopusqualityQ2
dc.identifier.startpage456
dc.identifier.urihttps://dx.doi.org/10.1361/105994903770343024
dc.identifier.urihttps://hdl.handle.net/11480/5704
dc.identifier.volume12
dc.identifier.wosWOS:000184811600016
dc.identifier.wosqualityQ4
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.institutionauthor[0-Belirlenecek]
dc.language.isoen
dc.publisherASM INTERNATIONAL
dc.relation.ispartofJOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.subjectbroken-lamellar growth
dc.subjectdirectional solidification
dc.subjecteutectic alloys
dc.subjectlamellar spacings
dc.subjectSn-Zn eutectic alloys
dc.subjectundercooling
dc.subjectmicrostructure
dc.titleEffect of growth rates and temperature gradients on the spacing and undercooling in the broken-lamellar eutectic growth (Sn-Zn eutectic system)
dc.typeArticle

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