Mehrabi, M, Gardy, J, Talebi, FA et al. (3 more authors) (2023) An investigation of the effect of powder flowability on the powder spreading in additive manufacturing. Powder Technology, 413. 117997. ISSN 0032-5910
Abstract
Identification of the most reliable method to characterise powder flow behaviour in correlation with the conditions of powder spreading in additive manufacturing (AM) is still challenging. In this study, a number of standard and advanced flowability techniques were used to characterise the flowability of two grades of Ti6Al4V powder (gas atomized, GA, and hydride-dehydride, HDH) used for the powder bed fusion (PBF) based AM. In parallel, the powder spreading behaviour was characterised using an in-house spreading rig. It is found that GA powder has better spreading behaviour than HDH, owing to its better flowability due to the regular particle shapes. However, none of the flow test techniques investigated in this paper can offer a correlation between the dynamic powder flow and powder spreadability at varying speeds. The study in this work has revealed the shortcomings in correlating the flowability of powder and their spreadability under real process conditions.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2022 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). |
Keywords: | Ball indentation; Powder bed fusion; Powder flowability; Powder spreading; Ti6Al4V powders |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Chemical & Process Engineering (Leeds) |
Funding Information: | Funder Grant number EPSRC (Engineering and Physical Sciences Research Council) EP/P006566/1 |
Depositing User: | Symplectic Publications |
Date Deposited: | 14 Nov 2022 12:47 |
Last Modified: | 14 Nov 2022 12:47 |
Status: | Published |
Publisher: | Elsevier |
Identification Number: | 10.1016/j.powtec.2022.117997 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:193150 |