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Solidification of metal alloys in pulse electromagnetic fields

Manuwong, Theerapatt


Theerapatt Manuwong



This research studies the evolution of solidification microstructures in applied external physical fields including in a pulse electric current plus a static magnetic field, and a pulse electromagnetic field. A novel electromagnetic pulse device and a solidification apparatus were designed, built and commissioned in this research. It can generate programmable electromagnetic pulses with tuneable amplitudes, durations and frequencies to suit different alloys and sample dimensions for research at university laboratory and at synchrotron X-ray beamlines.

Systematic studies were made using the novel pulse electromagnetic field device, together with finite element modelling of the multiphysics of the pulse electromagnetic field and microstructural characterisation of the samples made using scanning electron microscopy, X-ray imaging and tomography.

The research demonstrated that the Lorentz force and magnetic flux are the dominant parameters for achieving the grain refinement and enhancing the solute diffusion. At a discharging voltage from 120 V, a complete equaxied dendritic structure can be achieved for Al-15Cu alloy samples, the strong Lorentz force not only disrupts the growing direction of primary dendrites, it is also enough to disrupts the growing directions of primary intermetallic Al2Cu phases in Al-35Cu alloy, resulting a refined solidification microstructures. The applied electromagnetic field also has significant effect on refining the eutectic structures and promoting the solute diffusion in the eutectic laminar structure.

The research has demonstrated that the pulse electromagnetic field is a promising green technology for metal manufacture industry.


Manuwong, T. (2015). Solidification of metal alloys in pulse electromagnetic fields. (Thesis). University of Hull. Retrieved from

Thesis Type Thesis
Deposit Date Oct 13, 2015
Publicly Available Date Feb 23, 2023
Keywords Engineering
Public URL
Additional Information School of Engineering, The University of Hull
Award Date Apr 1, 2015


Thesis (13.8 Mb)

Copyright Statement
© 2015 Manuwong, Theerapatt. All rights reserved. No part of this publication may be reproduced without the written permission of the copyright holder.

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