About this Abstract |
Meeting |
2020 TMS Annual Meeting & Exhibition
|
Symposium
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Additive Manufacturing of Functional and Energy Materials
|
Presentation Title |
Microstructural Characterization of Alnico Alloy Fabricated by Selective Laser Melting |
Author(s) |
Paul F. Rottmann, Andrew Polonsky, McLean P. Echlin, Michael Krispin, Gotthard Rieger, Stefan Lampenscherf, Tresa M. Pollock, Carlos G. Levi |
On-Site Speaker (Planned) |
Paul F. Rottmann |
Abstract Scope |
Alnico alloys have regained increased interest in recent years as an alternative to rare earth containing permanent magnets to alleviate issues of supply instability and sustainability. The ability to additively manufacture permanent magnets additionally promises to increase sustainability by reducing material waste while expanding capabilities to enable system integration and production of novel geometries. The magnetic properties of alnico depend on a refined microstructure, so there is the substantial hurdle of understanding the complex processing—thermal history—microstructure relationships to achieve viability. The microstructural characterization of an alnico 8 alloy fabricated by selective laser melting will be presented. Characterization was performed by TEM and using the TriBeam system at UCSB for 3D analysis. The microstructure is comparable to conventionally-produced alnico, but the presence of αγ precipitates indicates that further process tuning is needed to achieve an optimal microstructure. Preliminary results from magnetic characterization conducted at Siemens will also be presented. |
Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |