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Mechanical behaviour of additively manufactured lunar regolith simulant components

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journal contribution
posted on 23.04.2018, 10:10 by Athanasios Goulas, J.G.P. Binner, Daniel Engstrom, Russell A. Harris, Ross J. Friel
Additive manufacturing and its related techniques have frequently been put forward as a promising candidate for planetary in-situ manufacturing, from building life-sustaining habitats on the Moon to fabricating various replacements parts, aiming to support future extra-terrestrial human activity. This paper investigates the mechanical behaviour of lunar regolith simulant material components, which is a potential future space engineering material, manufactured by a laser-based powder bed fusion additive manufacturing system. The influence of laser energy input during processing was associated with the evolution of component porosity, measured via optical and scanning electron microscopy in combination with gas expansion pycnometry. The compressive strength performance and Vickers microhardness of the components were analysed and related back to the processing history and resultant microstructure of the lunar regolith simulant build material. Fabricated structures exhibited a relative porosity of 44 – 49% and densities ranging from 1.76 – 2.3 g cm-3, with a maximum compressive strength of 4.2 ± 0.1 MPa and elastic modulus of 287.3 ± 6.6 MPa, the former is comparable to a typical masonry clay brick (3.5 MPa). The 2AM parts also had an average hardness value of 657 ± 14 HV0.05/15, better than borosilicate glass (580 HV). This study has shed significant insight into realizing the potential of a laser-based powder bed fusion AM process to deliver functional engineering assets via in-situ and abundant material sources that can be potentially used for future engineering applications in aerospace and astronautics.

History

School

  • Mechanical, Electrical and Manufacturing Engineering

Published in

Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications

Volume

233

Issue

8

Pages

1629-1644

Citation

GOULAS, A. ...et al., 2018. Mechanical behaviour of additively manufactured lunar regolith simulant components. Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications, 233(8), pp. 1629-1644.

Publisher

SAGE Publications © IMechE

Version

AM (Accepted Manuscript)

Rights holder

© IMechE

Publisher statement

This work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/

Acceptance date

16/03/2018

Publication date

2019-08-01

Copyright date

2019

Notes

This paper was published in the journal Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications and the definitive published version is available at https://doi.org/10.1177/1464420718777932.

ISSN

1464-4207

Language

en

Exports

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Keywords

Exports