Solidification of Al alloys under electromagnetic pulses and characterization of the 3D microstructures under synchrotron x-ray tomography

Manuwong, Theerapatt; Zhang, Wei; Kazinczi, Peter Lobo; Bodey, Andrew J.; Rau, Christoph; Mi, Jiawei

Abstract

A novel programmable electromagnetic pulse device was developed and used to study the solidification of Al-15 pct Cu and Al-35 pct Cu alloys. The pulsed magnetic fluxes and Lorentz forces generated inside the solidifying melts were simulated using finite element methods, and their effects on the solidification microstructures were characterized using electron microscopy and synchrotron X-ray tomography. Using a discharging voltage of 120 V, a pulsed magnetic field with the peak Lorentz force of ~1.6 N was generated inside the solidifying Al-Cu melts which were showed sufficiently enough to disrupt the growth of the primary Al dendrites and the Al2Cu intermetallic phases. The microstructures exhibit a strong correlation to the characteristics of the applied pulse, forming a periodical pattern that resonates the frequency of the applied electromagnetic field.

Citation

Manuwong, T., Zhang, W., Kazinczi, P. L., Bodey, A. J., Rau, C., & Mi, J. (2015). Solidification of Al alloys under electromagnetic pulses and characterization of the 3D microstructures under synchrotron x-ray tomography. Metallurgical and materials transactions. A, Physical metallurgy and materials science, 46(7), 2908-2915. https://doi.org/10.1007/s11661-015-2874-8

• Acceptance Date: Feb 1, 2015
• Online Publication Date: Apr 3, 2015
• Publication Date: Jul 26, 2015
• Deposit Date: Apr 18, 2016
• Publicly Available Date: Apr 18, 2016
• Journal: Metallurgical and materials transactions a
• Print ISSN: 1073-5623
• Publisher: Springer Verlag
• Peer Reviewed: Peer Reviewed
• Volume: 46
• Issue: 7
• Pages: 2908-2915
• DOI: https://doi.org/10.1007/s11661-015-2874-8
• Keywords: Synchrotron x-ray; Tomography; Electro-magnetic pulse; Solidification; Al alloys
• Public URL: https://hull-repository.worktribe.com/output/436251
• Publisher URL: http://link.springer.com/article/10.1007%2Fs11661-015-2874-8
• Additional Information: This is an authors accepted manuscript of an article published in Metallurgical and materials transactions a, 2015, v.46 issue 7. The final publication is available at Springer via http://dx.doi.org/10.1007/s11661-015-2874-8.
• Contract Date: Apr 18, 2016