Predicting microstructure evolution during directed energy deposition additive manufacturing of Ti-6Al-4V

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dc.authorid0000-0001-7583-7655
dc.contributor.authorBaykasoğlu, Cengiz
dc.contributor.authorAkyıldız, Öncü
dc.contributor.authorCandemir, Duygu
dc.contributor.authorYang, Qingcheng
dc.contributor.authorTo, Albert C.
dc.date.accessioned2019-05-13T09:02:29Z
dc.date.available2019-05-13T09:02:29Z
dc.date.issued2018
dc.departmentHitit Üniversitesi, Mühendislik Fakültesi, Makine Mühendisliği Bölümü
dc.description.abstractLaser engineering net shaping (LENS) is one of the representative processes of directed energy deposition (DED) in which a moving heat source having high-intensity melts and fuses metal powders together to print parts. The complex and nonuniform thermal gradients during the laser heating and cooling cycles in the LENS process directly affect the microstructural characteristics, and thereby the ultimate mechanical properties of fabricated parts. Therefore, prediction of microstructure evolution during the LENS process is of paramount importance. The objective of this study is to present a thermomicrostructural model for predicting microstructure evolution during the LENS process of Ti-6Al-4V. First, a detailed transient thermal finite element (FE) model is developed and validated for a sample LENS process. Then, a density type microstructural model which enables calculation of the a-phase fractions (i.e., Widmanstatten colony and basketweave a-phase fractions), b-phase fraction, and alpha lath widths during LENS process is developed and coupled to the thermal model. The microstructural algorithm is first verified by comparing the phase fraction results with the results presented in the literature for a given thermal history data. Second, the average lath width values calculated using the model are compared with the experimentally measured counterparts, where a reasonable agreement is achieved in both cases. Copyright © 2018 by ASME.
dc.identifier.citationBaykasoğlu, C., Akyıldız, Ö., Candemir, D., Yang, Q., To, A. C. (2018). Predicting microstructure evolution during directed energy deposition additive manufacturing of Ti-6Al-4V. Journal of Manufacturing Science and Engineering, 140(5), 051003.
dc.identifier.doi10.1115/1.4038894
dc.identifier.issn1087-1357
dc.identifier.issue5en_US
dc.identifier.scopusqualityQ1
dc.identifier.urihttps://doi.org/10.1115/1.4038894
dc.identifier.urihttps://hdl.handle.net/11491/1263
dc.identifier.volume140en_US
dc.identifier.wosqualityN/A
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherAmerican Society of Mechanical Engineers (ASME)
dc.relation.ispartofJournal of Manufacturing Science and Engineering, Transactions of the ASME
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.subject[Belirlenecek]en_US
dc.titlePredicting microstructure evolution during directed energy deposition additive manufacturing of Ti-6Al-4V
dc.typeArticle

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