Microstructural Characterization and Modeling of Beam Speed Effects on Ti-6Al-4V by Electron Beam Additive Manufacturing

dc.creatorGong, X.
dc.creatorLydon, J.
dc.creatorCooper, K.
dc.creatorChou, K.
dc.date.accessioned2021-10-12T22:59:01Z
dc.date.available2021-10-12T22:59:01Z
dc.date.issued2014
dc.description.abstractIn this study, the influence of the beam scanning speed to the microstructure of Ti-6Al4V parts processed by EBAM is investigated. EBAM parts were fabricated with 4 different scanning speeds, ranging from 214 mm/s to 689 mm/s, and the microstructures were studied. In addition, the volume fractions of different phases were obtained by thermal and phase transformation modeling. The microstructure is characterized by columnar structures of prior β grains along the build direction, and fine Widmanstätten (α+β) structure and α′ martensites are presented inside of the prior β. Both the prior β grain size and α-lath thickness decrease with the increase of the scanning speed. For the phase constitution, the volume fraction of α′ increases with the scanning speed while the volume fraction of α decreases due to the increase of cooling rate during solid phase transformation. The results from the analytical phase transformation model are consistent with the microstructure characterization from the experiment.en_US
dc.description.departmentMechanical Engineeringen_US
dc.identifier.urihttps://hdl.handle.net/2152/88765
dc.identifier.urihttp://dx.doi.org/10.26153/tsw/15699
dc.language.isoengen_US
dc.publisherUniversity of Texas at Austinen_US
dc.relation.ispartof2014 International Solid Freeform Fabrication Symposiumen_US
dc.rights.restrictionOpenen_US
dc.subjectelectron beam additive manufacturingen_US
dc.subjectadditive manufacturingen_US
dc.subjectbeam scanning speeden_US
dc.subjectmicrostructureen_US
dc.subjectTi-6Al-4Ven_US
dc.titleMicrostructural Characterization and Modeling of Beam Speed Effects on Ti-6Al-4V by Electron Beam Additive Manufacturingen_US
dc.typeConference paperen_US

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