| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Phase Transformations and Microstructural Evolution
|
| Presentation Title |
Thermal Stability of Quasicrystals in a Candidate Al Alloy for Additive Manufacturing |
| Author(s) |
Baris Yavas, Mingxuan X. Li, S. Pamir Alpay, Mark Aindow |
| On-Site Speaker (Planned) |
Baris Yavas |
| Abstract Scope |
Metal additive manufacturing (MAM) has attracted intense interest for a wide variety of industrial applications. One of the more novel material types that is under consideration for MAM is quasicrystal (QC) reinforced metal matrix composites (MMCs). In this study, we evaluated an Al-Cu-Fe-Cr alloy, which contains a dispersion of icosahedral QCs. Laser glazing studies have been performed to evaluate the potential for using this alloy in additive manufacturing, and QC formation was observed over a wide range of processing parameters. Since the QC reinforcement phase is inherently metastable, it is important to understand the mechanism and conditions for the thermal decomposition (crystallization) of this phase. In situ transmission electron microscopy heating studies can provide unique insights into such processes. Here we report in situ isothermal heating studies performed at between 350-500 °C on the laser-glazed materials to reveal the thermal stability and decomposition products of the QC dispersions. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Aluminum, Phase Transformations, Characterization |