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Meeting 2023 TMS Annual Meeting & Exhibition
Symposium Advanced Real Time Imaging
Presentation Title In-situ monitoring and post operando analysis of additively manufacturing lunar regolith simulants parts
Author(s) Caterina Iantaffi, Chu Lun Alex Leung, Samy Hocine , Elena Ruck , Marta Majkut, Martina Meisnar , Thomas Rohr , Peter D. Lee
On-Site Speaker (Planned) Caterina Iantaffi
Abstract Scope Additive Manufacturing (AM) using in-situ resource utilisation (ISRU, i.e. using local resources) has been identified as a key technology for on-demand component fabrication on the moon and extra-terrestrial planets. Laser powder bed fusion (LPBF) has received increasing attention to produce components made of fine lunar grey soil - regolith. On earth, LPBF is a key AM technology; however, obtaining the optimal parameters to AM rich oxidised metals such as regoliths requires extensive characterisation and understanding of the key mechanisms. Here, we use synchrotron x-ray imaging to reveal the laser interaction, melt flow dynamics and solidification mechanism of regoliths. Severe vaporisation and pore formation dominate the process, requiring novel printing strategies to improve densification of two commercial regolith simulants. Both simulants demonstrate different spreadability and laser interactions, studied further on large printed parts to define a processability window. These results help identify practices for additively manufacturing regolith components in space.
Proceedings Inclusion? Planned:
Keywords Additive Manufacturing, Other,

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In-situ Magnetic Computed Tomography for additive manufacturing
In-situ monitoring and post operando analysis of additively manufacturing lunar regolith simulants parts
In-situ TEM study of rapidly solidifed AlCuLi based alloys
In-situ Visualization of Retrograde Melting Phenomenon During Solidification of Boron-bearing Steels
In situ Investigation on the Multi-Scale Deformation Mechanisms of Hierarchically Structured Boron Nitride Nanotube based Composites
In situ observations of rapid solidification of metallic materials using a high-speed camera
Interfacial Strength in Microparticle Impact-Induced Bonding
Machine Learning for In-situ Detection of Local Heat Accumulation in Additive Manufacturing
Mapping the Melt Pool Variability in L-PBF Additive Manufacturing by High-Speed Imaging
Microstructure evolution during laser-based powder bed fusion studied by operando X-ray radiography
Microstructure evolution of TRIP-assisted lean duplex stainless steel UNS S32101 during in-situ tensile
Prediction of Laser Absorptivity from Synchrotron X-ray Images Using Deep Convolutional Neural Networks
Real-time Optical Visualization of Battery Reactions and Processes
Real-time Plasmon-Enhanced Colorimetric Imaging
Real Time Imaging of Laser Melting and Re-Solidification
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Reinforcement of Band Delta-Ferrite Stability by Secondary Particles in AISI 416 Stainless Steel Investigated by in-situ Characterization
Stabilization of solid amine adsorbents by nano-Al2O3 crosslinking polyethyleneimine: Efficient CO2 adsorption and superior anti-urea stability
Study of Fracture Behaviors of Epoxy-Alumina Composite Using Mechanical Testing Coupled with Micro-CT
Thermal Stability of fcc-bcc Nanolaminates Containing 3D Interfaces
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Visualization of Molten Slag Suspension by Electrical Impedance Tomography

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