| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Phase Transformations and Microstructural Evolution
|
| Presentation Title |
Microstructures in Icosahedral-Phase-Strengthened Aluminum Alloy Powders for Additive Manufacturing |
| Author(s) |
Mingxuan Li, Sarshad Rommel, Thomas Watson, Callie Benson, Rainer Hebert, Mark Aindow |
| On-Site Speaker (Planned) |
Mingxuan Li |
| Abstract Scope |
Recently, we have developed a series of Al-Cr-Mn-Co-Zr alloys that exhibit nano-composite microstructures in gas-atomized powders. The microstructures comprise an FCC Al matrix with quasicrystalline I-phase dispersoids. The morphology and distribution of the I-phase varied with the particle size due to changes in nucleation mechanisms with cooling rate. The I-phase was retained during consolidation of the powder to form bulk alloys, and the resultant materials exhibited excellent mechanical properties and corrosion resistance. The properties indicate that there is significant potential for the use of this alloy system in metal additive manufacturing. Here we present microstructural data obtained from powders of a new Al-Cr-Mn-Co-Zr alloy whose composition has been modified specifically for use in additive manufacturing. The variation in the I-phase dispersoid morphology and distribution with particle size is compared with that observed in earlier alloy formulations, and the effects of microstructure on the character of the surface oxides is discussed. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Characterization, Aluminum, Additive Manufacturing |