Increasing Ti-6Al-4V brazed joint strength equal to the base metal by Ti and Zr amorphous filler alloys

dc.citation.epage40en_US
dc.citation.spage31en_US
dc.citation.volumeNumber71en_US
dc.contributor.authorGanjeh, E.en_US
dc.contributor.authorSarkhosh H.en_US
dc.contributor.authorBajgholi, M.E.en_US
dc.contributor.authorKhorsand H.en_US
dc.contributor.authorGhaffari, M.en_US
dc.date.accessioned2016-02-08T09:44:59Z
dc.date.available2016-02-08T09:44:59Z
dc.date.issued2012en_US
dc.departmentDepartment of Electrical and Electronics Engineeringen_US
dc.departmentInstitute of Materials Science and Nanotechnology (UNAM)en_US
dc.description.abstractMicrostructural features developed along with mechanical properties in furnace brazing of Ti-6Al-4V alloy using STEMET 1228 (Ti-26.8Zr-13Ni-13.9Cu, wt.%) and STEMET 1406 (Zr-9.7Ti-12.4Ni-11.2Cu, wt.%) amorphous filler alloys. Brazing temperatures employed were 900-950 °C for the titanium-based filler and 900-990 °C for the zirconium-based filler alloys, respectively. The brazing time durations were 600, 1200 and 1800 s. The brazed joints were evaluated by ultrasonic test, and their microstructures and phase constitutions analyzed by metallography, scanning electron microscopy and X-ray diffraction analysis. Since microstructural evolution across the furnace brazed joints primarily depends on their alloying elements such as Cu, Ni and Zr along the joint. Accordingly, existence of Zr 2Cu, Ti 2Cu and (Ti,Zr) 2Ni intermetallic compounds was identified in the brazed joints. The chemical composition of segregation region in the center of brazed joints was identical to virgin filler alloy content which greatly deteriorated the shear strength of the joints. Adequate brazing time (1800 s) and/or temperature (950 °C for Ti-based and 990 °C for Zr-based) resulted in an acicular Widmanstätten microstructure throughout the entire joint section due to eutectoid reaction. This microstructure increased the shear strength of the brazed joints up to the Ti-6Al-4V tensile strength level. Consequently, Ti-6Al-4V can be furnace brazed by Ti and Zr base foils produced excellent joint strengths. © 2012 Elsevier Inc. All rights reserved.en_US
dc.identifier.doi10.1016/j.matchar.2012.05.016en_US
dc.identifier.issn10445803
dc.identifier.urihttp://hdl.handle.net/11693/21340
dc.language.isoEnglishen_US
dc.relation.isversionofhttp://dx.doi.org/10.1016/j.matchar.2012.05.016en_US
dc.source.titleMaterials Characterizationen_US
dc.subjectFurnace brazingen_US
dc.subjectMechanical propertiesen_US
dc.subjectMicrostructureen_US
dc.subjectTi-6Al-4V alloyen_US
dc.subjectXRD analysisen_US
dc.subjectBase metalsen_US
dc.subjectBrazed jointen_US
dc.subjectBrazing temperatureen_US
dc.subjectBrazing timeen_US
dc.subjectChemical compositionsen_US
dc.subjectEutectoid reactionen_US
dc.subjectFiller alloyen_US
dc.subjectFurnace brazingen_US
dc.subjectJoint strengthen_US
dc.subjectMicrostructural featuresen_US
dc.subjectPhase constitutionen_US
dc.subjectTi-6al-4ven_US
dc.subjectTi-6Al-4V alloyen_US
dc.subjectTitanium-baseden_US
dc.subjectUltrasonic testen_US
dc.subjectXRD analysisen_US
dc.subjectAlloying elementsen_US
dc.subjectAlloysen_US
dc.subjectAluminumen_US
dc.subjectAmorphous alloysen_US
dc.subjectBrazingen_US
dc.subjectCerium alloysen_US
dc.subjectFillersen_US
dc.subjectFurnacesen_US
dc.subjectJoints (structural components)en_US
dc.subjectMechanical propertiesen_US
dc.subjectMicrostructural evolutionen_US
dc.subjectMicrostructureen_US
dc.subjectScanning electron microscopyen_US
dc.subjectTitaniumen_US
dc.subjectUltrasonic testingen_US
dc.subjectX ray diffraction analysisen_US
dc.subjectZirconiumen_US
dc.subjectTitanium alloysen_US
dc.titleIncreasing Ti-6Al-4V brazed joint strength equal to the base metal by Ti and Zr amorphous filler alloysen_US
dc.typeArticleen_US
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