Binder jetting of SS316L: a computational approach for droplet-powder interaction
ISSN: 1355-2546
Article publication date: 24 April 2023
Issue publication date: 3 July 2023
Abstract
Purpose
This study aims to describe the effects of capillary forces or action, viscosity, gravity and inertia via the computational fluid dynamics (CFD) analysis. The study also includes distribution of the binder droplet over the powder bed after interacting from different heights.
Design/methodology/approach
Additive manufacturing (AM) has revolutionized many industries. Binder jetting (BJT) is a powder-based AM method that enables the production of complex components for a wide range of applications. The pre-densification interaction of binder and powder is vital among various parameters that can affect the BJT performance. In this study, BJT process is studied for the binder interaction with the powder bed of SS316L. The effect of the droplet-powder distance is thoroughly analysed. Two different droplet heights are considered, namely, h1 (zero) and h2 (9.89 mm).
Findings
The capillary and inertial effects are predominant, as the distance affects these parameters significantly. The binder spreading and penetration depth onto the powder bed is influenced directly by the distance of the binder droplet. The former increases with an increase in latter. The binder distribution over the powder bed, whether uniform or not, is studied by the stream traces. The penetration depth of the binder was also observed along the cross-section of the powder bed through the same.
Originality/value
In this work, the authors have developed a more accurate representative discrete element method of the powder bed and CFD analysis of binder droplet spreading and penetration inside the powder bed using Flow-3D. Moreover, the importance of the splashing due to the binder’s droplet height is observed. If splashing occurs, it will produce distortion in the powder, resulting in a void in the final part.
Keywords
Acknowledgements
This project has received funding from the European Union’s Horizon 2020 research and innovation programme under the Marie Skłodowska-Curie grant agreement No 764935 and 101034425. This study has also received funding from The Scientific and Technological Research Council of Türkiye (TUBITAK) with the grant No 120C158 for the same A2M2TECH project under the TUBITAK’s 2236/B program.
Erratum: It has come to the attention of the Publisher that the article “Binder jetting of SS316L: a computational approach for droplet-powder interaction” by Asif Ur Rehman, Kashif Azher, Abid Ullah, Celal Sami Tüfekci and Metin Uymaz Salamci, published in Rapid Prototyping Journal, Vol. ahead-of-print, No. ahead-of-print, https://doi.org/10.1108/RPJ-08-2022-0264, included an error in Kashif Azher’s affiliation. This error was introduced during the production process and the article has now been updated online. The affiliation has changed from Department of Mechanical Engineering, Faculty of Engineering, Gazi University, Ankara, Türkiye, and ERMAKSAN, Bursa, Türkiye to Department of Mechanical Engineering, Faculty of Engineering, Gazi University, Ankara, Türkiye and Additive Manufacturing Technologies Application and Research Center-EKTAM, Ankara, Türkiye. The publisher sincerely apologises for this error and for any confusion caused.
Corrigendum: It has come to the attention of the publisher that the article “Binder jetting of SS316L: a computational approach for droplet-powder interaction” by Asif Ur Rehman, Kashif Azher, Abid Ullah, Celal Sami Tüfekci and Metin Uymaz Salamci, published in Rapid Prototyping Journal, Vol. 29, No. 7, https://doi.org/10.1108/RPJ-08-2022-0264, did not fully acknowledge the funding received from The Scientific and Technological Research Council of Türkiye (TUBITAK). The acknowledgement has now been updated online. The authors sincerely apologise for this error and for any misunderstanding.
Citation
Ur Rehman, A., Azher, K., Ullah, A., Tüfekci, C.S. and Salamci, M.U. (2023), "Binder jetting of SS316L: a computational approach for droplet-powder interaction", Rapid Prototyping Journal, Vol. 29 No. 7, pp. 1499-1509. https://doi.org/10.1108/RPJ-08-2022-0264
Publisher
:Emerald Publishing Limited
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