Journal
SCRIPTA MATERIALIA
Volume 105, Issue -, Pages 14-17Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2015.04.016
Keywords
Thermal fluid dynamics; Porosity; Selective laser melting; Ti-6A1-4V
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Funding
- Rolls-Royce plc, Manufacturing Technology Centre, University Of Birmingham
- European Regional Development Fund
- AMAZE project - European Commission
- Engineering and Physical Sciences Research Council [EP/H500367/1, EP/H500375/1] Funding Source: researchfish
- EPSRC [EP/H500375/1, EP/H500367/1] Funding Source: UKRI
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Thermal fluid dynamics and experiments have been used to study the evolution of pores during selective laser melting of Ti-6A1-4V. Scanning electron micrographs show that the morphology of pores changed from near-spherical to elongated shape as the laser scan speed increased. Computational fluid dynamics suggests that this is caused by the change of flow pattern in the melt pool which is dictated by forces such as vapour pressure, gravitational force, capillary and thermal capillary forces exerted on the metallic/gaseous interface. (C) 2015 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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