Effect of heat treatments on the microhardness and tensile strength of Al-0.25 wt.% Zr alloy

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dc.contributor.authorCadirli, Emin
dc.contributor.authorTecer, Hicran
dc.contributor.authorSahin, Mevlut
dc.contributor.authorYilmaz, Elif
dc.contributor.authorKirindi, Talip
dc.contributor.authorGunduz, Mehmet
dc.date.accessioned2020-06-25T18:13:15Z
dc.date.available2020-06-25T18:13:15Z
dc.date.issued2015
dc.departmentKırıkkale Üniversitesi
dc.description.abstractIn the present work, the effect of heat treatments on the microhardness and tensile properties of the Al-0.25 Zr (wt.%) alloy have been investigated. The Al-0.25 Zr (wt.%) alloy was melted in a vacuum furnace, and the molten alloy was poured into crucibles held in a hot filing furnace. Then, the samples were directionally solidified from bottom to top and aged isothermally and isochronally in a muffle furnace. Aging was performed in two ways: using a wide range of temperatures (350-600 degrees C) with a constant aging time (100 h) and a wide range of aging times (3-240 h) with a constant temperature (400 degrees C). The dependence of the microhardness (HV) and ultimate tensile strength (sigma(UTS)) on the aging temperatures and aging times was determined. According to the experimental results, the HV and sigma(UTS) values of the aged samples increase at a certain aging temperature and aging time values, reaching peak values at specific temperatures and aging times. The microhardness and ultimate tensile strength decreased with further increase of aging temperatures and aging times. The microscopic fracture surfaces of the aged samples under different aging conditions were observed using scanning electron microscopy. Fractographic analysis of the tensile fracture surfaces shows that the type of fracture changed significantly from ductile to brittle depending on the aging times. Transmission electron microscopy was also used to characterize the precipitation processes in an Al-0.25 Zr (wt.%) alloy aged at 400 degrees C for 120 h. (C) 2015 Elsevier B. V. All rights reserved.en_US
dc.description.sponsorshipMinistry of Science Industry and Technology [00303, STZ 2008-2]; Erciyes University (ERU) Scientific Research Project UnitErciyes University [FOA-2014-5195]; Ministry of Science Industry and Technology; ERU Scientific Research Project Uniten_US
dc.description.sponsorshipThis project was supported by the Ministry of Science Industry and Technology under Contract No: 00303, STZ 2008-2 and Erciyes University (ERU) Scientific Research Project Unit under Contract No: FOA-2014-5195. The authors would like to thank Ministry of Science Industry and Technology and ERU Scientific Research Project Unit for financial support.en_US
dc.identifier.citationclosedAccessen_US
dc.identifier.doi10.1016/j.jallcom.2015.01.193
dc.identifier.endpage237en_US
dc.identifier.issn0925-8388
dc.identifier.issn1873-4669
dc.identifier.scopus2-s2.0-84922356060
dc.identifier.scopusqualityQ1
dc.identifier.startpage229en_US
dc.identifier.urihttps://doi.org/10.1016/j.jallcom.2015.01.193
dc.identifier.urihttps://hdl.handle.net/20.500.12587/6161
dc.identifier.volume632en_US
dc.identifier.wosWOS:000350388900035
dc.identifier.wosqualityQ1
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherElsevier Science Saen_US
dc.relation.ispartofJournal Of Alloys And Compounds
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectAgingen_US
dc.subjectMicrohardnessen_US
dc.subjectTensile strengthen_US
dc.subjectFracture surfaceen_US
dc.subjectAl-Zr alloysen_US
dc.titleEffect of heat treatments on the microhardness and tensile strength of Al-0.25 wt.% Zr alloyen_US
dc.typeArticle

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