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Study of thermoelectric magnetohydrodynamic convection on solute redistribution during laser additive manufacturing

Study of thermoelectric magnetohydrodynamic convection on solute redistribution during laser additive manufacturing

Kao, A ORCID: 0000-0002-6430-2134, Gan, T, Tonry, C ORCID: 0000-0002-8214-0845, Krastins, I and Pericleous, K ORCID: 0000-0002-7426-9999 (2020) Study of thermoelectric magnetohydrodynamic convection on solute redistribution during laser additive manufacturing. In: IOP Conference Series: Materials Science and Engineering. IOP Publishing, 012009. ISSN 1757-8981 (Print), 1757-899X (Online) (doi:https://doi.org/10.1088/1757-899X/861/1/012009)

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Abstract

Melt pools formed in laser additive manufacturing (AM) are subject to large thermal gradients, resulting in the formation of thermoelectric currents due to the Seebeck effect. When in the presence of an external magnetic field, a Lorentz force is formed which drives fluid flow in the melt pool. This Thermoelectric Magnetohydrodynamics (TEMHD) phenomenon, can have a significant impact on the melt pool morphology and can alter the microstructural evolution of the solidification process. By coupling steady-state mesoscopic melt pool calculations to a microscopic solidification model, predictions of the resulting microstructure for multiple deposited layers have been obtained. The results indicate that the magnetic field can have a transformative effect on the microstructure and solute redistribution. This study highlights the theoretical potential for using magnetic fields as an additional control system to tailor AM microstructures.

Item Type: Conference Proceedings
Title of Proceedings: IOP Conference Series: Materials Science and Engineering
Additional Information: Presented at MCWASP XV: International Conference on Modelling of Casting, Welding and Advanced Solidification Processes 22-23 June 2020, Jönköping, Sweden.
Uncontrolled Keywords: additive manufacturing, microstructure, thermoelectric magnetohydrodynamics
Subjects: Q Science > QA Mathematics
Faculty / Department / Research Group: Faculty of Liberal Arts & Sciences
Faculty of Liberal Arts & Sciences > Centre for Numerical Modelling & Process Analysis (CNMPA)
Faculty of Liberal Arts & Sciences > Centre for Numerical Modelling & Process Analysis (CNMPA) > Computational Science & Engineering Group (CSEG)
Faculty of Liberal Arts & Sciences > School of Computing and Mathematical Sciences
Last Modified: 15 Jun 2020 11:09
Selected for GREAT 2016: None
Selected for GREAT 2017: None
Selected for GREAT 2018: None
Selected for GREAT 2019: None
Selected for REF2021: None
URI: http://gala.gre.ac.uk/id/eprint/28563

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