| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing: Materials Design and Alloy Development II
|
| Presentation Title |
A-60: Effect of Laser Glazing on Quasicrystals in Powder-processed Icosahedral-phase-strengthened Aluminum Alloys |
| Author(s) |
Mingxuan Li, Hannah R Leonard, Sarshad Rommel, Thomas Watson, Tod Policandriotes, Mark Aindow |
| On-Site Speaker (Planned) |
Mingxuan Li |
| Abstract Scope |
Recently, we have developed an Al-Cr-Mn-Co-Zr alloy that exhibits a nano-composite FCC Al plus I-phase microstructure in gas-atomized powder. This microstructure is retained during consolidation of the powder to form bulk material. This consolidated material was subjected to surface laser glazing with scan rates ranging from 0.2 m/s to 1.2 m/s and powers ranging from 180 W to 330 W, and the effects of these process parameters on the resulting microstructure were evaluated. At low scan rate and high power, coarse pseudo-dendritic dispersoids were found in the melt pool. With increasing scan rate and decreasing power, smaller spherical precipitates formed. At the highest scan rate and lowest power, the melt pool consisted of a single solid solution phase. The microstructures and chemical compositions of the phases were characterized using scanning electron microscopy and transmission electron microscopy. Finally, the possibility of additive manufacturing for these metal matrix composites was evaluated. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |