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Meeting 2022 TMS Annual Meeting & Exhibition
Symposium Powder Metallurgy of Light, Reactive and Other Non-ferrous Metals
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


Accelerated Powder Consolidation in Nanocrystalline Materials Competes with Organic Burn-off
Cost Down and Plain Design of High-performance Titanium via Additive Manufacturing
Influence of Calcium Powder in Heavily Deformed Aluminum-calcium Metal-metal Composites
Investigations of Phase Transformations in a Blended Elemental Ti-Nb-Zr-O Alloys Prepared by a Field-assisted Sintering Technique
Microstructural Refinement and Uniformity of Refractory Metals
Microstructural/Mechanical Properties Relationship of Elongated Ti-15Mo Bars Produced by Unconventional Spark Plasma Sintering Technology
Scaling Up Porous Copper Foams by Planetary Milling and Oxide Reduction
Titanium Near Net Shape PM Parts Produced by Direct Powder Forging

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