Outgassing properties of additively manufactured aluminium

Ciarán Breen; James Walpole; Carolyn Atkins; Scott McPhee; Mark Cliffe; Jamie Moffat; Maisie Edwards-Mowforth; Isla Lister; Lucy Reynolds; Andrew Conley; Sam Allum; Robert M. Snell; Sam Tammas-Williams; Steve Watson

doi:10.1117/12.2627331

29 August 2022 Outgassing properties of additively manufactured aluminium

Ciarán Breen, James Walpole, Carolyn Atkins, Scott McPhee, Mark Cliffe, Jamie Moffat, Maisie Edwards-Mowforth, Isla Lister, Lucy Reynolds, Andrew Conley, Sam Allum, Robert M. Snell, Sam Tammas-Williams, Steve Watson

Author Affiliations +

Proceedings Volume 12188, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation V; 121882I (2022) https://doi.org/10.1117/12.2627331
Event: SPIE Astronomical Telescopes + Instrumentation, 2022, Montréal, Québec, Canada

Conference Poster

Abstract

Details of a programme to investigate the outgassing rate of additively manufactured (AM) aluminium alloys are presented. AM has significant potential benefits to applications in ground- and space-based instrumentation, particularly in mass optimisation, part consolidation and increased design freedom. However, its use in high-risk projects is often curtailed by lack of heritage and an imperfect understanding of the materials. The programme goal was to address one of the most significant topics preventing wider adoption of AM technology in cryogenic and space-based applications; uncertainty about material outgassing. The sensitivity of outgassing rates to various key parameters was characterised, including print method, post-processing and geometrical complexity. Correlation of outgassing rates against other measurable properties, such as sample porosity and surface roughness, was also investigated via the use of X-ray computed tomography and profilometry. Finally, the test apparatus, experimental design and implications of the findings on design and process control are discussed.

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Ciarán Breen, James Walpole, Carolyn Atkins, Scott McPhee, Mark Cliffe, Jamie Moffat, Maisie Edwards-Mowforth, Isla Lister, Lucy Reynolds, Andrew Conley, Sam Allum, Robert M. Snell, Sam Tammas-Williams, and Steve Watson "Outgassing properties of additively manufactured aluminium", Proc. SPIE 12188, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation V, 121882I (29 August 2022); https://doi.org/10.1117/12.2627331

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