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Sandwich structure printing of Ti-Ni-Ti by directed energy deposition
journal contribution
posted on 2022-11-21, 01:28 authored by A Farzaneh, M Khorasani, E Farabi, Ian GibsonIan Gibson, M Leary, AH Ghasemi, Bernard RolfeBernard RolfeIn the current work, sandwich structure (Ti-6Al-4V)-Ni-(Ti-6Al-4V) is printed by Laser Engineered Net Shaping (LENS). This sandwich structure allows the general repair of broken parts with dissimilar materials. The chief objective of this research is to propose a new method to produce a sandwich structure comprising Ti-6Al-4V and Nickel by DED, which allows the investigation of the Ti-6Al-4V/Nickel and Nickel/Ti-6Al-4V interfaces. The results shed light on the production process and makes a proper roadmap for multi-material printing. The contributions of this paper are the detailed defect characterization of (Ti-6Al-4V)-Ni-(Ti-6Al-4V) sandwich structures, considering the rheological phenomena in the meltpool and thermophysical properties of the materials. This research also identifies how the interface quality and the overall bonding quality of the sandwich structures can be improved, enabling the exploration of the limitations of production, and the knowledge of how to potentially produce a defect-free sandwich structure of Ti-Ni-Ti. Results showed that cracks, pores, partial melting, keyholes and residual particles are the main problems during a build. These results indicate that the LENS is a promising method to produce sandwich structures for various applications by selecting the appropriate process parameters in such a way as to minimize the rheological instability.
History
Journal
Virtual and Physical PrototypingVolume
17Pagination
1006-1030Location
London, Eng.Publisher DOI
ISSN
1745-2759eISSN
1745-2767Language
EnglishPublication classification
C1 Refereed article in a scholarly journalIssue
4Publisher
Taylor & FrancisUsage metrics
Categories
Keywords
BOUNDARYcrackdirect energy depositionEngineeringEngineering, ManufacturingLIQUIDMaterials ScienceMaterials Science, MultidisciplinarymicrostructureporePROCESS PARAMETERSRESIDUAL-STRESSSandwich structureScience & TechnologyTechnologyTI-6AL-4VDesign Practice and Management not elsewhere classifiedAutomotive Engineering not elsewhere classifiedMechanical Engineering
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