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Meeting 2023 TMS Annual Meeting & Exhibition
Symposium Advanced Real Time Imaging
Presentation Title Microstructure Evolution during Laser-based Powder Bed Fusion Studied by Operando X-ray Radiography
Author(s) Steven Van Petegem
On-Site Speaker (Planned) Steven Van Petegem
Abstract Scope Laser powder bed fusion (L-PBF) is a “layer-by-layer” additive manufacturing process, in which parts are built up by adding precursor powder layers and selectively scanning them with a high-power laser, resulting in the densification of consecutive slices of a three-dimensional object. During L-PBF, heating and cooling rates up to 10 million degrees per second have been reported, leading to far-from-equilibrium microstructures and the formation of unwanted defects such as pores and cracks. To study the evolution of the microstructure during L-PBF, we have developed a dedicated miniaturized L-PBF device optimized for installation at synchrotron X-ray diffraction and imaging beamlines. In this presentation, I will demonstrate how this device was used to study the microstructure evolution in Ti and Fe-based alloys with time resolutions down to 25Ás.
Proceedings Inclusion? Planned:
Keywords Additive Manufacturing, Solidification, Other


4D Microstructural Evolution of Bismuth (Bi) Phase during Solidification of Sn-58Bi Solder
Behavior of Plastic Ashes in Gasification Environments
Combination of Confocal Laser Scanning Microscopy and Machine Learning Model for the Prediction of Oxide Dissolution in the Steelmaking Slag
Does Confocal Laser Scanning Microscopy Have the Suitable Capability to Use in Physical Metallurgy?
Energy Absorption Properties of Open-Cell Rhombic Dodecahedron Cellular Lattice Structures Under Shock Compression
Estimation of Interfacial Strain Response for a Bi-material Strip in Tensile and Shear Loading Using THz-TDS
High-Temperature Wetting of Calcium Alloys and Molten Salts
High-velocity Interactions of Laser-driven Tin Ejecta Microjets via X-ray Radiography
In-situ Lithium Carbonate Formation in Brines by CO2 Injection
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
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 Plasmon-Enhanced Colorimetric Imaging
Real Time Imaging of Laser Melting and Re-Solidification
Recent Advances in Ultrafast Real-time Imaging of Sonoprocessing Advanced Materials
Reinforcement of Band Delta-Ferrite Stability by Secondary Particles in AISI 416 Stainless Steel Investigated by In-situ Characterization
Study of Fracture Behaviors of Epoxy-Alumina Composite Using Mechanical Testing Coupled with Micro-CT
Thermal Stability of fcc-bcc Nanolaminates Containing 3D Interfaces
Three-dimensional Assessment of Strain Localization at the Sub-grain Level of a Ni-based Superalloy at Low and High Temperature Using Laser Scanning Confocal Microscopy
Visualization of Molten Slag Suspension by Electrical Impedance Tomography

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