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.accessioned2019-08-01T13:38:39Z
dc.date.available2019-08-01T13:38:39Z
dc.date.issued2015
dc.departmentNiğde ÖHÜ
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.
dc.description.sponsorshipMinistry of Science Industry and Technology [00303, STZ 2008-2]; Erciyes University (ERU) Scientific Research Project Unit [FOA-2014-5195]; Ministry of Science Industry and Technology; ERU Scientific Research Project Unit
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.
dc.identifier.doi10.1016/j.jallcom.2015.01.193
dc.identifier.endpage237
dc.identifier.issn0925-8388
dc.identifier.issn1873-4669
dc.identifier.scopus2-s2.0-84922356060
dc.identifier.scopusqualityQ1
dc.identifier.startpage229
dc.identifier.urihttps://dx.doi.org/10.1016/j.jallcom.2015.01.193
dc.identifier.urihttps://hdl.handle.net/11480/3937
dc.identifier.volume632
dc.identifier.wosWOS:000350388900035
dc.identifier.wosqualityQ1
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.institutionauthor[0-Belirlenecek]
dc.language.isoen
dc.publisherELSEVIER SCIENCE SA
dc.relation.ispartofJOURNAL OF ALLOYS AND COMPOUNDS
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.subjectAging
dc.subjectMicrohardness
dc.subjectTensile strength
dc.subjectFracture surface
dc.subjectAl-Zr alloys
dc.titleEffect of heat treatments on the microhardness and tensile strength of Al-0.25 wt.% Zr alloy
dc.typeArticle

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