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Alpha texture variations in additive manufactured Ti-6Al-4V investigated with neutron diffraction
Luleå University of Technology, Luleå, Sweden.
European Spallation Source ERIC, Lund, Sweden. Nuclear Physics Institute of the CAZ, Czech Republic.
Paul Scherrer Institute, Villigen, Switzerland; Malmö University, Malmö, Sweden.
Karlsruhe Institute of Technology, Karlsruhe, Germany; Frank Laboratory of Neutron Physics, Dubna, Russian Federation.
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2018 (English)In: Additive Manufacturing, ISSN 2214-8604, Vol. 23, p. 225-234Article in journal (Refereed) Published
Abstract [en]

Variation of texture in Ti-6Al-4V samples produced by three different additive manufacturing (AM) processes has been studied by neutron time-of-flight (TOF) diffraction. The investigated AM processes were electron beam melting (EBM), selective laser melting (SLM) and laser metal wire deposition (LMwD). Additionally, for the LMwD material separate measurements were done on samples from the top and bottom pieces in order to detect potential texture variations between areas close to and distant from the supporting substrate in the manufacturing process. Electron backscattered diffraction (EBSD) was also performed on material parallel and perpendicular to the build direction to characterize the microstructure. Understanding the context of texture for AM processes is of significant relevance as texture can be linked to anisotropic mechanical behavior. It was found that LMwD had the strongest texture while the two powder bed fusion (PBF) processes EBM and SLM displayed comparatively weaker texture. The texture of EBM and SLM was of the same order of magnitude. These results correlate well with previous microstructural studies. Additionally, texture variations were found in the LMwD sample, where the part closest to the substrate featured stronger texture than the corresponding top part. The crystal direction of the α phase with the strongest texture component was [112¯3]. © 2018 Elsevier B.V.

Place, publisher, year, edition, pages
Elsevier, 2018. Vol. 23, p. 225-234
Keywords [en]
Neutron time-of-flight diffraction, SKAT, Texture, Ti-6Al-4V, Additive manufacturing
National Category
Manufacturing, Surface and Joining Technology
Research subject
ENGINEERING, Manufacturing and materials engineering
Identifiers
URN: urn:nbn:se:hv:diva-12979DOI: 10.1016/j.addma.2018.08.018ISI: 000453495500022Scopus ID: 2-s2.0-85051782355OAI: oai:DiVA.org:hv-12979DiVA, id: diva2:1259047
Note

Funders: InterReg ESS & MaxIV: Cross Border Science and Society, MAH-003; Joint Institute for Nuclear Research, 2016-10-14-12-57-50, 2016-10-14-12-49-17; Nationellt rymdtekniskt forskningsprogram (NRFP);  EU funded Space for innovation and growth (RIT); Graduate School of Space Technology at Luleå University of Technology; OP RDE . MEYS, under the project “European Spallation Source – participation of the Czech Republic – OP”, Reg. No. CZ.02.1.01/0.0/0.0/16013/00

Available from: 2018-10-26 Created: 2018-10-26 Last updated: 2019-05-24Bibliographically approved

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Pederson, Robert

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