| About this Abstract |
| Meeting |
2022 TMS Annual Meeting & Exhibition
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| Symposium
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Powder Metallurgy of Light, Reactive and Other Non-ferrous Metals
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| Presentation Title |
Influence of Calcium Powder in Heavily Deformed Aluminum-calcium Metal-metal Composites |
| Author(s) |
Dustin Hickman, Trevor Riedemann, Jordan Tiarks, Iver Anderson |
| On-Site Speaker (Planned) |
Dustin Hickman |
| Abstract Scope |
Although most overhead power transmission cables are constrained to strengthening through addition of less electrically conductive core strands, a monotype composite conductor design throughout the cable cross section is made possible by Al/Ca heavily deformed metal-metal composite (DMMCs) wires. Utilizing a powder metallurgy (PM) route, Al/Ca DMMCs provide competitive strength and conductivity to “strong-core” overhead conductors for reduced losses, especially in high-voltage direct current (HVDC) applications. In the development of Al/Ca DMMCs, Hall-Petch strengthening with electrical conductivity relating directly to the rule-of-mixtures was observed. With this tradeoff for increased strength and decreased conductivity, the tunability of this PM approach allows facile optimization of these properties. Also, the opportunity exists to decrease Ca powder size to exploit enhanced Hall-Petch strengthening, while decreasing vol.% Ca loading to increase conductivity. This research focuses on such optimization of Al/Ca DMMC conductor design. Funding from DOE-OE through DE-AC02-07CH11358. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Powder Materials, Composites, Phase Transformations |