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Microstructural characterization and comparison of Ti-6Al-4V manufactured with different additive manufacturing processes
Luleå University of Technology, Division of Materials Science, Luleå 971 81, Sweden.
Luleå University of Technology, Division of Materials Science, Luleå 971 81, Sweden.
University West, Department of Engineering Science, Division of Welding Technology. (PTW)ORCID iD: 0000-0002-7675-7152
Luleå University of Technology, Division of Materials Science, Luleå 971 81, Sweden.
2018 (English)In: Materials Characterization, ISSN 1044-5803, E-ISSN 1873-4189Article in journal (Refereed) Accepted
Abstract [en]

In this work, the microstructures of Ti-6Al-4V manufactured by different additive manufacturing (AM) processes have been characterized and compared. The microstructural features that were characterized are the α lath thickness, grain boundary α (GB-α) thickness, prior β grain size and α colony size. In addition, the microhardnesses were also measured and compared. The microstructure of shaped metal deposited (SMD) Ti-6Al-4V material showed the smallest variations in α lath size, whereas the material manufactured with laser metal wire deposition-0 (LMwD-0) showed the largest variation. The prior β grain size was found to be smaller in material manufactured with powder bed fusion (PBF) as compared with corresponding material manufactured with the directed energy deposition (DED) processes. Parallel bands were only observed in materials manufactured with DED processes while being non-present in material manufactured with PBF processes.

Place, publisher, year, edition, pages
2018.
Keywords [en]
Additive manufacturing, Shaped metal deposition, Selective laser melting, Electron beam melting, Laser metal wire/powder deposition, Ti-6Al-4V
National Category
Manufacturing, Surface and Joining Technology
Research subject
ENGINEERING, Manufacturing and materials engineering
Identifiers
URN: urn:nbn:se:hv:diva-12078DOI: 10.1016/j.matchar.2018.02.003Scopus ID: 2-s2.0-85042273976OAI: oai:DiVA.org:hv-12078DiVA, id: diva2:1184655
Note

Available online 10 February 2018

Available from: 2018-02-22 Created: 2018-02-22 Last updated: 2018-03-05Bibliographically approved

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Pederson, Robert

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