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Solidification of Al Alloys Under Electromagnetic Pulses and Characterization of the 3D Microstructures Using Synchrotron X-ray Tomography

DOI: 10.1007/s11661-015-2874-8 DOI Help

Authors: Theerapatt Manuwong (University of Hull) , Wei Zhang (University of Hull) , Peter Lobo Kazinczi (University of Hull) , Andrew Bodey (Diamond Light Source) , Christoph Rau (Diamond Light Source) , Jiawei Mi (University of Hull)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Metallurgical And Materials Transactions A , VOL 46A (7) , PAGES 2908-2915

State: Published (Approved)
Published: April 2015
Diamond Proposal Number(s): 9974

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.

Subject Areas: Materials


Instruments: I13-2-Diamond Manchester Imaging