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dc.contributor.authorAlijani F.en_US
dc.contributor.authorAmini, R.en_US
dc.contributor.authorGhaffari, M.en_US
dc.contributor.authorAlizadeh, M.en_US
dc.contributor.authorOkyay, Ali Kemalen_US
dc.date.accessioned2016-02-08T10:59:26Z
dc.date.available2016-02-08T10:59:26Z
dc.date.issued2014en_US
dc.identifier.issn0261-3069
dc.identifier.urihttp://hdl.handle.net/11693/26411
dc.description.abstractIn the present paper, the effect of milling process on the chemical composition, structure, microhardness, and thermal behavior of Ti-41Ni-9Cu compounds developed by mechanical alloying was evaluated. The structural characteristic of the alloyed powders was evaluated by X-ray diffraction (XRD). The chemical composition homogeneity and the powder morphology and size were studied by scanning electron microscopy coupled with electron dispersive X-ray spectroscopy. Moreover, the Vickers micro-indentation hardness of the powders milled for different milling times was determined. Finally, the thermal behavior of the as-milled powders was studied by differential scanning calorimetery. According to the results, at the initial stages of milling (typically 0-12. h), the structure consisted of a Ni solid solution and amorphous phase, and by the milling evolution, nanocrystalline martensite (B19') and austenite (B2) phases were initially formed from the initial materials and then from the amorphous phase. It was found that by the milling development, the composition uniformity is increased, the inter-layer thickness is reduced, and the powders microhardness is initially increased, then reduced, and afterward re-increased. It was also realized that the thermal behavior of the alloyed powders and the structure of heat treated samples is considerably affected by the milling time.en_US
dc.language.isoEnglishen_US
dc.source.titleMaterials and Designen_US
dc.relation.isversionofhttp://dx.doi.org/10.1016/j.matdes.2013.09.009en_US
dc.subjectCrystal structureen_US
dc.subjectCrystallizationen_US
dc.subjectMechanical alloyingen_US
dc.subjectMicro-hardnessen_US
dc.subjectMicrostructureen_US
dc.subjectTiNiCu shape memory alloysen_US
dc.subjectAmorphous materialsen_US
dc.subjectCrystal structureen_US
dc.subjectCrystallizationen_US
dc.subjectDifferential scanning calorimetryen_US
dc.subjectMechanical alloyingen_US
dc.subjectMicrohardnessen_US
dc.subjectMicrostructureen_US
dc.subjectNanocrystalline materialsen_US
dc.subjectNickelen_US
dc.subjectPowdersen_US
dc.subjectScanning electron microscopyen_US
dc.subjectShape memory effecten_US
dc.subjectX ray diffractionen_US
dc.subjectX ray powder diffractionen_US
dc.subjectX ray spectroscopyen_US
dc.subjectAs-milled powdersen_US
dc.subjectChemical compositionsen_US
dc.subjectMicro-indentation hardnessen_US
dc.subjectNanocrystallinesen_US
dc.subjectPowder morphologyen_US
dc.subjectStructural characteristicsen_US
dc.subjectThermal behaviorsen_US
dc.subjectTiNiCu shape memory alloysen_US
dc.subjectMilling (machining)en_US
dc.titleEffect of milling time on the structure, micro-hardness, and thermal behavior of amorphous/nanocrystalline TiNiCu shape memory alloys developed by mechanical alloyingen_US
dc.typeArticleen_US
dc.departmentDepartment of Electrical and Electronics Engineeringen_US
dc.departmentInstitute of Materials Science and Nanotechnology (UNAM)en_US
dc.citation.spage373en_US
dc.citation.epage380en_US
dc.citation.volumeNumber55en_US
dc.identifier.doi10.1016/j.matdes.2013.09.009en_US
dc.publisherElsevier Ltden_US
dc.contributor.bilkentauthorOkyay, Ali Kemal


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