Effect of Growth Rate on the Microstructure and Microhardness in a Directionally Solidified Al-Zn-Mg Alloy

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dc.contributor.authorAcer, Emine
dc.contributor.authorCadirli, Emin
dc.contributor.authorErol, Harun
dc.contributor.authorGunduz, Mehmet
dc.date.accessioned2019-08-01T13:38:39Z
dc.date.available2019-08-01T13:38:39Z
dc.date.issued2016
dc.departmentNiğde ÖHÜ
dc.description.abstractThe Al-5.5Zn-2.5Mg (wt pct) ternary alloy was prepared using a vacuum melting furnace and a casting furnace. Five samples were directionally solidified upwards at a constant temperature gradient (G = 5.5 K/mm) under different growth rates (V = 8.3-165 mu m/s) in a Bridgman-type directional solidification furnace. The primary dendrite arm spacing, lambda (1), secondary dendrite arm spacing, lambda (2), and microhardness, HV, of the samples were measured. The effects of V on lambda (1), lambda (2) and HV properties of the Al-Zn-Mg alloy were studied by microstructure analysis and mechanical characterization. Microstructure characterization of the alloys was carried out using optical microscopy, scanning electron microscopy, wavelength-dispersive X-ray fluorescence spectrometry, and energy dispersive X-ray spectroscopy. From the experimental results, it is found that the lambda (1), lambda (2) values decrease, but HV values increase with the increase in V, and HV values decrease with the increase in lambda (1) and lambda (2). Dependencies of dendritic spacing and microhardness on the growth rate were determined using linear regression analysis. The growth rate, microstructure, and Hall-Petch-type relationships obtained in this work have been compared with the results of previous studies.
dc.description.sponsorshipErciyes University Scientific Research Project Unit [FBD-12-3978]
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/s11661-016-3484-9
dc.identifier.endpage3051
dc.identifier.issn1073-5623
dc.identifier.issn1543-1940
dc.identifier.issue6
dc.identifier.scopus2-s2.0-84964030904
dc.identifier.scopusqualityQ1
dc.identifier.startpage3040
dc.identifier.urihttps://dx.doi.org/10.1007/s11661-016-3484-9
dc.identifier.urihttps://hdl.handle.net/11480/3642
dc.identifier.volume47A
dc.identifier.wosWOS:000375330700046
dc.identifier.wosqualityQ1
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.institutionauthor[0-Belirlenecek]
dc.language.isoen
dc.publisherSPRINGER
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.titleEffect of Growth Rate on the Microstructure and Microhardness in a Directionally Solidified Al-Zn-Mg Alloy
dc.typeArticle

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