About this Abstract |
| Meeting |
2027 TMS Annual Meeting & Exhibition
|
| Symposium
|
Aluminum Alloys: Development and Fabrication Symposium and Supplier Forum
|
| Presentation Title |
Influence of Intermetallic Morphology on the Ductility of Cast Aluminum Alloys Made from Recycled Content |
| Author(s) |
Katherine Rader, Kyoo Sil Choi, Jung Pyung Choi, Aashish Rohatgi |
| On-Site Speaker (Planned) |
Katherine Rader |
| Abstract Scope |
Cast secondary aluminum alloys often have high levels of Fe impurities which form brittle, Fe-containing intermetallics that act as stress concentrators. We have been investigating the use of sonic (low frequency) and ultrasonic (high frequency) processing to refine the β-Al5FeSi intermetallic phase to improve ductility. While this phase is qualitatively known to be more deleterious to ductility than script-like intermetallics (e.g., α-Al15(Fe,Mn)3Si2), the microstructure-property relationships between intermetallics and ductility have not been well explored. To address this gap, we used microstructure-based finite-element models to quantify the effects of particle size, volume fraction, orientation, and nearest neighbor distance on ductility and tensile strength. Notably, reducing particle length from 250 to 65 microns (while increasing the number of particles to maintain a constant volume fraction) improved tensile elongation from ~13% to ~19%. These simulations will be discussed in relation to the use of sonic processing to refine β-Al5FeSi particles and improve ductility. |
| Proceedings Inclusion? |
Planned: Light Metals |
| Keywords |
Aluminum, Recycling and Secondary Recovery, Modeling and Simulation |