Microstructural evolution and room-temperature mechanical properties of as-cast and heat-treated Fe50Al50-nNbn alloys (n=1, 3, 5, 7, and 9 at%)

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dc.contributor.authorYildirim, Mehmet
dc.contributor.authorAkdeniz, M. Vedat
dc.contributor.authorMekhrabov, Amdulla O.
dc.date.accessioned2020-03-26T19:25:05Z
dc.date.available2020-03-26T19:25:05Z
dc.date.issued2016
dc.departmentSelçuk Üniversitesien_US
dc.description.abstractThe microstructural evolution and room-temperature mechanical properties of Fe50Al50-nNbn alloys (n=1, 3, 5, 7, and 9 at%) were investigated after solidification and subsequent heat treatment. For all the compositions, the (Fe, Al)(2)Nb Laves phase formed because of the incomplete solid solubility of Nb in the Fe-Al-based phases and tended to develop an eutectic mixture with the Fe-Al-based phase. According to the results of EDS analysis and microstructural investigations, the Nb concentration of the eutectic composition was 9 at%, and the solid solubility of Nb in the B2-type Fe-Al-based phase was 3 at%. In addition, the eutectic phase transition temperature was approximately 1265 degrees C. Compared with the as cast state, all the heat-treated alloys exhibited ultrahigh compressive strength and considerably increased compressive fracture strains. The heat-treated hypoeutectic Fe50Al42Nb3 alloy exhibited the highest compressive strength and fracture strain of 3.02 GPa and 33.1%, respectively, and the eutectic Fe(50)oAl(41)Nb(9) alloy exhibited the lowest compressive strength and fracture strain of 2.66 GPa and 21.8%, respectively, because of the absence of the comparably softer Fe-Al-based primary dendrites. The superior mechanical properties of the heat-treated alloys were attributed to the bimodal distribution of the microstructure, structural incoherency between the crystalline phases, and elimination of solidification artifacts and lattice defects. (C) 2016 Elsevier B.V. All rights reserved.en_US
dc.description.sponsorshipScientific and Technological Research Council of Turkey, TUBITAK, National Scholarship Programmeen_US
dc.description.sponsorshipThis paper was prepared from Ph.D. thesis of Mehmet Yildirim. The authors gratefully acknowledge OYP Program at Middle East Technical University and The Scientific and Technological Research Council of Turkey, TUBITAK, National Scholarship Programme for Ph.D. Students.en_US
dc.identifier.doi10.1016/j.msea.2016.03.128en_US
dc.identifier.endpage25en_US
dc.identifier.issn0921-5093en_US
dc.identifier.issn1873-4936en_US
dc.identifier.scopusqualityQ1en_US
dc.identifier.startpage17en_US
dc.identifier.urihttps://dx.doi.org/10.1016/j.msea.2016.03.128
dc.identifier.urihttps://hdl.handle.net/20.500.12395/33783
dc.identifier.volume664en_US
dc.identifier.wosWOS:000375819700004en_US
dc.identifier.wosqualityQ1en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.publisherELSEVIER SCIENCE SAen_US
dc.relation.ispartofMATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSINGen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.selcuk20240510_oaigen_US
dc.subjectIron aluminides (based on FeAl)en_US
dc.subjectMicrostructureen_US
dc.subjectMechanical properties at ambient temperaturesen_US
dc.subjectCompressive propertiesen_US
dc.titleMicrostructural evolution and room-temperature mechanical properties of as-cast and heat-treated Fe50Al50-nNbn alloys (n=1, 3, 5, 7, and 9 at%)en_US
dc.typeArticleen_US

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