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Published in: Journal of Materials Engineering and Performance 8/2022

01-08-2022 | Technical Article

Tuning the Properties of Additively Manufactured Tungsten Ultra-fine Lattices by Adjusting Laser Energy Density and Lattice Geometry

Authors: Carly J. Romnes, James F. Stubbins, Omar R. Mireles

Published in: Journal of Materials Engineering and Performance | Issue 8/2022

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Abstract

Additive manufacturing (AM) offers unique advantages for manufacturing complex geometries from refractory metals, which are difficult to form using traditional processes. In this study, tungsten lattices of approximately 5 × 5 × 5 mm were additively manufactured using various laser energy densities and lattice topologies. Applications for these lattice structures include catalysts for monopropellant and green propulsion, wicking materials in heat pipes, and high thermal load structures. The use of AM allows these lattices to be integrated into other structures, with the capability of tuning properties such as mechanical properties, pressure drop, and surface area. This work investigates the effects of lattice topology and print parameters on the mechanical and fluid flow properties of these lattices. Due to the small unit cell and strut size of these lattices, the print parameters directly impact the lattice feature resolution, which were characterized using scanning electron microscopy. Compression tests were performed to determine the effect of laser energy density on lattice strength. Flow tests were performed with water and nitrogen to characterize the pressure drop across these samples as a function of printing laser energy density and lattice topology. Our paper will discuss the results of these experiments and their implications.
Literature
6.
go back to reference T. McKechnie and A. Shchetkovskiy, Development of Metallic Foams Monolithic Catalysts for Green Monopropellant Propulsion, Proceedings of Space Propulsion Conference, 2016, p 232 T. McKechnie and A. Shchetkovskiy, Development of Metallic Foams Monolithic Catalysts for Green Monopropellant Propulsion, Proceedings of Space Propulsion Conference, 2016, p 232
Metadata
Title
Tuning the Properties of Additively Manufactured Tungsten Ultra-fine Lattices by Adjusting Laser Energy Density and Lattice Geometry
Authors
Carly J. Romnes
James F. Stubbins
Omar R. Mireles
Publication date
01-08-2022
Publisher
Springer US
Published in
Journal of Materials Engineering and Performance / Issue 8/2022
Print ISSN: 1059-9495
Electronic ISSN: 1544-1024
DOI
https://doi.org/10.1007/s11665-022-07126-3

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