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Effect of process route on powder three-dimensional-printing of metal powders

Ifeanyichukwu Donald Olumor (Department of Mechanical and Aerospace Engineering, University of California San Diego, La Jolla, California, USA and Department of Mechanical Engineering, San Diego State University, San Diego, California, USA)
Lee Geuntak (Department of Mechanical and Aerospace Engineering, University of California San Diego, La Jolla, California, USA and Department of Mechanical Engineering, San Diego State University, San Diego, California, USA)
Eugene Olevsky (Department of Nano Engineering, University of California San Diego, La Jolla, California, USA and Department of Mechanical Engineering, San Diego State University, San Diego, California, USA)

Rapid Prototyping Journal

ISSN: 1355-2546

Article publication date: 12 January 2021

Issue publication date: 2 March 2021

132

Abstract

Purpose

The purpose of this study is to investigate the effect of two unique processing routes (solvent jetting (SJ) and binder jetting (BJ)), on the green density of printed stainless steel 316L (SS316L) and Nickel (Ni) powders.

Design/methodology/approach

In the SJ processing route, a solvent is jetted unto the powder/binder mixture to selectively activate the binder, layer by layer. In the BJ processing route, a solution of the binder mixture is jetted onto the powder bed to selectively bind powder particles. The effects of printing parameters such as layer height, roller speed, shaker speed and nozzle temperature on the green density of printed components are investigated and compared for both processing routes.

Findings

Results show that layer height and nozzle temperature affect the relative density of the printed compact for both processing routes. Slightly higher relative densities were achieved via the SJ route, with the overall highest relative density being 42.7% at 100 µm layer height and 70% nozzle temperature for the SS316L components and 43.7% at 150 µm layer height and 90% nozzle temperature for the Ni components, respectively. Results also show an increase in the final sintered relative density with an increase in green (printed) relative density of the solvent jetted SS316L components, with the highest relative density being 87.2%.

Originality/value

The paper studies the influence of printing parameters on the green density of printed SS316L and Ni samples in an unprecedented effort to provide a comparative understanding of the process-property relationships in BJ and SJ of SS316L and Ni components to the additive manufacturing research community.

Keywords

Acknowledgements

The support of the US Department of Energy, Materials Sciences Division, under Award No. DE-SC0008581 is gratefully acknowledged.

Citation

Olumor, I.D., Geuntak, L. and Olevsky, E. (2021), "Effect of process route on powder three-dimensional-printing of metal powders", Rapid Prototyping Journal, Vol. 27 No. 2, pp. 399-406. https://doi.org/10.1108/RPJ-06-2020-0127

Publisher

:

Emerald Publishing Limited

Copyright © 2020, Emerald Publishing Limited

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