Thickness dependency of surface properties for thin-walled titanium parts manufactured by Electron Beam Melting (EBM®)
(English)In: Additive Manufacturing Journal, ISSN 2214-8604Article in journal (Refereed) Submitted
The surface morphology of components produced by powder bed metal additive manufacturing is of interest for multiple industry sectors including biomedical and aerospace. For some applications, improvements in surface finish can reduce or eliminate the requirement for secondary finishing processes. In this study, titanium alloy (Ti6Al4V) samples were manufactured using the Electron Beam Melting (EBM) process. The effect of variations in sample thickness, powder size distribution and layer thickness were measured with three different techniques, both for direct measurement and comparison of the techniques. Ra-values in the range of 15 µm – 37 µm were obtained and varied depending on measurement technique. However, independent of technique, Ra values were found to be dependent on powder size distribution, build layer thickness, and wall thickness. Analytical transmission electron microscopy of cross sections prepared by focused ion beam milling revealed that the outermost surfaces consisted of an oxide layer of 5 nm -6 nm thickness.
Additive Manufacturing, Electron Beam Melting, Ti-6Al-4V, Surface roughness, Surface properties, Transmission Electron Microscopy
Metallurgy and Metallic Materials Medical Materials Production Engineering, Human Work Science and Ergonomics
Research subject Engineering Science with specialization in Materials Science
IdentifiersURN: urn:nbn:se:uu:diva-236638OAI: oai:DiVA.org:uu-236638DiVA: diva2:764846