Microstructural characterization and comparison of Ti-6Al-4V manufactured with different additive manufacturing processes

Journal Article · Sat Sep 15 04:00:00 EDT 2018 · Materials Characterization

DOI:https://doi.org/10.1016/J.MATCHAR.2018.02.003· OSTI ID:22805754

Akerfeldt, P. ^[1]; Pederson, R. ^[2]; Antti, M. -L.; Sandell, V. ^[1]

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1. Division of Materials Science, Luleå University of Technology, Luleå 971 81 (Sweden)
2. Division of Welding Technology, University West, Trollhättan 461 32 (Sweden)

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.

• OSTI ID: 22805754
• Journal Information: Materials Characterization, Journal Name: Materials Characterization Vol. 143; ISSN 1044-5803; ISSN MACHEX
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM COMPOUNDS
COMPARATIVE EVALUATIONS
DEPOSITION
ELECTRON BEAM MELTING
MICROHARDNESS
TERNARY ALLOY SYSTEMS
THICKNESS
TITANIUM COMPOUNDS
VANADIUM COMPOUNDS