Singh, Paramjot and Balla, V K and Tofangchi, Alireza and Atre, Sundar and Kate, Kunal H (2020) Printability studies of Ti-6Al-4V by metal fused filament fabrication (MF3). International Journal of Refractory Metals & Hard Materials , 91. Art No-105249. ISSN 0263-4368

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Abstract

Predicting the influence of material composition on the printability of highly filled metal powder-polymer systems present a significant challenge in metal fused filament fabrication (MF3). The current work presents an approach to evaluate new material compositions used to fabricate filaments for their printability. In this study, filaments with 59 vol.% (87 wt.%) of Ti-6Al-4V powder with two particle size distributions {fine (D-50 = 13 mu m) and coarse (D-50 = 30 mu m)} dispersed in a polymer matrix were examined. The respective forces to overcome the pressure drop, for successful printing, were found to increase with an increase in the feed rate, and were also dependent on the feedstock viscosity. In addition, shear forces estimated from the filament shear strength were found to be limiting conditions for successful printing. Based on these observations, a criterion has been proposed to evaluate filament printability from the predicted limiting force for filament failure and the required force to achieve continuous material flow for successful printing. Under present experimental conditions, successful printing was achieved up to 2 mm/s and 8 mm/s for fine and coarse powder filaments, in good agreement with the model predictions. The model was experimentally tested and found to be applicable for other compositions. The results demonstrate a new printability criterion to design novel materials for MF3.

Item Type:	Article
Additional Information:	Conference on Powder Metallurgy and Additive Manufacturing of Titanium (PMTi), Univ Utah, Salt Lake City, UT, SEP 24-27, 2019
Subjects:	Electronics
Divisions:	Bioceramics & Coating
Depositing User:	Bidhan Chaudhuri
Date Deposited:	25 Jan 2021 10:56
Last Modified:	25 Jan 2021 10:56
URI:	http://cgcri.csircentral.net/id/eprint/4860

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