|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Phase Transformations and Microstructural Evolution
||Precipitation Behavior in a Laser-glazed Powder-processed Icosahedral-phase-strengthened Aluminum Alloy
||Mingxuan Li, Hannah Leonard, Sarshad Rommel, Cain Hung, Thomas Watson, Tod Policandriotes, Rainer Hebert, Mark Aindow
|On-Site Speaker (Planned)
Laser glazing experiments were performed on a powder-processed Al-Cr-Mn-Co-Zr alloy with a nano-composite FCC Al matrix plus I-phase dispersoid microstructure to evaluate the potential of the alloy for use in metal additive manufacturing (MAM). Electron microscopy studies on the microstructures of single laser tracks revealed the formation of I-phase dispersoids in the melt pools at appropriate combinations of processing parameters. Subsequent experiments were performed using overlapping melt tracks, to more closely represent the conditions that might prevail in MAM. The overlapping melt pools exhibited a more complex microstructure than the single laser tracks particularly in the remelted regions. In-situ TEM experiments were performed on FIB-cut samples of single laser tracks using the same parameters as those for the overlapping laser track experiments to study the precipitation behavior caused by the interaction of adjacent melt tracks. The potential for developing new alloys for MAM based on such systems will be discussed.