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  • Quantification of melt pool dynamics and microstructure during . . .
    The 3D melt pool obtained through TriBeam tomography and the solidification time from APS radiography data were utilized to fine-tune parameters of a CFD simulation, namely emissivity and the Fresnel coefficient, permitting accurate quantification of the thermal conditions associated with the melt pool during a spot melt
  • Influence of oxygen content on melt pool dynamics in metal additive . . .
    Influence of oxygen content on melt pool dynamics in metal additive manufacturing: High-fidelity modeling with experimental validation Published in Acta Materialia, 2023 Abstract: In the metal additive manufacturing process, the exposure to oxygen and its incorporation into the melt pool are usually deemed unfavorable, but cannot be completely eliminated Yet, the understanding of this
  • Inexpensive High Fidelity Melt Pool Models in Additive Manufacturing . . .
    Specifically, we implement a 2-D diffusion model to spatially upscale cross-sections of the coarsely simulated melt pool to their high-fidelity equivalent We demonstrate the preservation of key metrics of the melting process between the ground truth simulation data and the diffusion model output, such as the temperature field, the melt pool
  • Influence of oxygen content on melt pool dynamics in metal additive . . .
    In the metal additive manufacturing process, the exposure to oxygen and its incorporation into the melt pool are usually deemed unfavorable, but cannot be completely eliminated Yet, the understanding of this inevitable process remains limited This work aims to shed light on the effect of oxygen content on melt pool dynamics through multiphysics thermal-fluid flow simulations of the laser
  • Data-driven prediction of keyhole features in metal additive . . .
    A data-driven method is proposed in this work to efficiently predict the molten pool and keyhole features characterized by a series of fitting curves under given manufacturing parameters, instead of simply predicting the molten pool and keyhole sizes The database consists of simulation cases with the high-fidelity thermal-fluid flow model
  • Influence of oxygen content on melt pool dynamics in metal additive . . .
    1 Staff Staff Publications Please use this identifier to cite or link to this item:
  • Numerical Simulations to Predict the Melt Pool Dynamics and Heat . . .
    Abstract Computational Fluid Dynamics (CFD) simulations are used in this work to study the dynamic behavior of the melt pool and heat transfer during the single-track laser melting process of a nickel-based superalloy (CMSX-4)
  • Influence of oxygen content on melt pool dynamics in metal additive . . .
    This work aims to shed light on the effect of oxygen content on melt pool dynamics through multiphysics thermal-fluid flow simulations of the laser powder bed fusion process
  • Understanding melt pool characteristics in laser powder bed fusion: An . . .
    Laser powder bed fusion (LPBF) has made significant progress in producing solid and porous metal parts with complex shapes and geometries However, LPBF produced parts often have defects (e g , porosity, residual stress, and incomplete melting) that hinder its large-scale industrial commercialization The LPBF process involves complex heat transfer and fluid flow, and the melt pool is a
  • In-situ experimental and high-fidelity modeling tools to advance . . .
    Specifically, for powder-fusion-based additive manufacturing such as laser powder bed fusion, the manufacturing process involves powder dynamics, heat transfer, phase transitions (melting, solidification, evaporation, and condensation), fluid flow (gas, vapor, and molten metal liquid), and their interactions
  • Unveiling gas–liquid metal reactions in metal additive manufacturing . . .
    Abstract Gases in the atmosphere inevitably react with the melt pool during metal additive manufacturing (AM) Oxygen is particularly reactive, and excessive uncontrolled oxidation is detrimental, so most machines purge the chamber with inert gases, which can minimize but not eliminate such reactions





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