ProgramMaster Logo
Conference Tools for 2022 TMS Annual Meeting & Exhibition
Register as a New User
Submit An Abstract
Propose A Symposium
Presenter/Author Tools
Organizer/Editor Tools
About this Abstract
Meeting 2022 TMS Annual Meeting & Exhibition
Symposium Defects and Properties of Cast Metals IV
Presentation Title Quantifying pore evolution during laser powder fusion using high-speed X-ray imaging and high fidelity multiphase simulation
Author(s) Chu Lun Alex Leung, Michael Mallon, Dawid Luczyniec, Yuze Huang, Samuel J. Clark, Yunhui Chen, Sebastian Marussi, Lorna Sinclair, Margie P. Olbinado, Elodie Boller, Alexander Rack, Iain Todd, Peter D. Lee
On-Site Speaker (Planned) Chu Lun Alex Leung
Abstract Scope Laser powder bed fusion additive manufacturing (LPBF) produces complex net-shape parts from alloy powders, in a layer-by-layer manner. X-ray imaging studies of pore evolution mostly focus on single-layer tracks on substrates, missing the interaction of the laser beam with pre-existing pores in prior layers. Here, we used an in situ and operando process replicator (ISOPR), synchrotron X-ray imaging and high fidelity simulation to monitor and elucidate the process dynamics during a multilayer build of a Ni-superalloy. We quantify the changes in keyhole geometry, porosity, and remelting zone, as a function of time, layer number, and local layer thickness. These results were compared with a multiphase and multiphysics simulation to reveal the solid-liquid-gas-metal vapour interaction, keyhole evolution mechanisms, melt pool, and porosity. This work highlights the impact of layer thickness on build quality for powder bed fusion processes and suggests ways to mitigate the formation of imperfections.
Proceedings Inclusion? Planned:
Keywords Additive Manufacturing, Solidification, Modeling and Simulation


3D characterization of competitive dendrite growth and on the role of low angle grain boundaries during solidification of single crystal Ni-based superalloys
Analysis of the Causes of the Fluctuation of the Liquid Level in the Mould for High-speed FTSC Thin Slab Continuous Casting
Analysis of the Causes of the Fluctuation of the Liquid Level in the Mould for High-speed FTSC Thin Slab Continuous Casting
Characterization of Second Phase Particles in Twin Roll Cast Aluminum Alloy AA 8011
Controlling Freckle Defect Formation using Magnetic Fields
Correlation between purification effect and surface segregation of impurities in aluminium at high temperatures
Effect of build height on micro-cracking of additively manufactured superalloy RENÉ 108 thin-wall components
Elucidating the relationship between arc behavior and solidification defects during Vacuum Arc Remelting of Superalloys
Evolution of microstructure and mechanical properties of the as-cast 1030B Al sheet during ultrasound-assisted continuous casting
Evolution of physicochemical properties of tundish covering flux in continuous casting process
Experimental investigation and thermodynamic consideration of oxide inclusions formation in Al-Mg alloys
Experimental Research on Dephosphorization of Mn-Si Alloys Based on CaO-CaF2 Slag System
How to prevent porosity defects in steel casting component
Hybrid additive manufacturing of island grain bicrystals
Improving Material Properties using Contactless Ultrasonic Cavitation
Measurement and Simulation of Reoxidation Inclusions in Steel Casting
Microstructure and properties of Al-alloys produced by the counter gravity casting
Modeling the bonding and structure of non-metallic inclusions within a nickel matrix during forging
Modelling Concurrent Structural Mechanical Mechanisms in Microstructure Solidification
Modification of cast and wrought aluminum parts using hybrid laser hot-wire manufacturing
Nucleation in Undercooled Melt upon Changes in the Electromagnetic Stirring
Numerical Modelling of porosity with combined gas and shrinkage effects in HPDC
Particle Capture Defects in Continuous Steel Casting
Porosity defects in High Pressure Die Castings: Mechanisms and Uncertainties
Porosity formation in high pressure die casting: experiments and simulations
Probabilistic multiscale finite element model for predicting strength and fracture strain of cast Al-Si-Mg alloy
Quantifying pore evolution during laser powder fusion using high-speed X-ray imaging and high fidelity multiphase simulation
Research progress of composite preparation technology of bimetallic wire
The Influence of Environmental and Material Properties Data on Defect Predictions in Computational Fluid Dynamics Simulations of Investment Casting
The mechanical properties and microstructural of cast zinc though aluminum inoculation by ultrasonic treatment
Uncertainty Quantification of Model Predictions due to Fluid Flow in Laser Powder Bed Fusion of IN625
Understanding effects of oxide bifilms on solidification microstructures by multiscale modeling
Using Inoculation and Solidification Rate Adjustments to Control Intermetallic Distribution in Nickel Gear Bronze
Utilization of Industrial waste as an alternative to silica sand for foundry industries

Questions about ProgramMaster? Contact