Processing windows for Ti-6Al-4V fabricated by selective electron beam melting with improved beam focus and different scan line spacings
ISSN: 1355-2546
Article publication date: 31 December 2018
Issue publication date: 12 July 2019
Abstract
Purpose
Selective electron beam melting (SEBM) is a highly versatile powder bed fusion additive manufacturing method. SEBM is characterized by high energy densities which can be applied with nearly inertia free beam deflection at high speeds (<8.000 m/s). This paper aims to determine processing maps for Ti-6Al-4V on an Arcam Q10 machine with LaB6 cathode design.
Design/methodology/approach
Scan line spacings of 100, 50 and 20 µm in a broad parameter range, focusing on high deflection and build speeds are investigated.
Findings
There are broad processing windows for dense parts without surface flaws for all scan line spacings which are defined by the total energy input and the area melting velocity.
Originality/value
The differences and limitations are discussed taking into account the beam properties at high beam energy and velocity as well as evaporation related loss of alloying components.
Keywords
Acknowledgements
The authors gratefully thank the German Research Foundation (DFG) for funding this research in the Collaborative Research Centre SFB 814, project B2. The research presented in this paper was accomplished within the framework of the Technology Transfer center VerTec in Fuerth. The authors gratefully acknowledge the financial support from the Bavarian Ministry of Economic Affairs and Media, Energy and Technology.
Citation
Pobel, C.R., Osmanlic, F., Lodes, M.A., Wachter, S. and Körner, C. (2019), "Processing windows for Ti-6Al-4V fabricated by selective electron beam melting with improved beam focus and different scan line spacings", Rapid Prototyping Journal, Vol. 25 No. 4, pp. 665-671. https://doi.org/10.1108/RPJ-04-2018-0084
Publisher
:Emerald Publishing Limited
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