| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Scandium Extraction and Use in Aluminum Alloys
|
| Presentation Title |
Effect of Sc and Zr Microalloying on Grain Structure After Hot Deformation and Brazing in 3xxx Alloys |
| Author(s) |
Alyaa Bakr, Paul Rometsch , X.-Grant Chen |
| On-Site Speaker (Planned) |
X.-Grant Chen |
| Abstract Scope |
A series of Al-Mn 3xxx alloys are used in the fabrication of multi-port extruded (MPE) tubes for aluminium heat exchangers. The industrial manufacture for these tubes consists of homogenization, extrusion, sizing, and brazing. The combination of sizing and brazing could result in abnormally coarsened grains that have negative impacts on the in-service performance of MPE tubes. In this work, we simulated the industrial manufacturing process of the MPE tubes. The 3xxx alloy micro alloyed with 0.08 wt% Sc and 0.09 wt% Zr was assessed with respect to the grain structures after hot deformation and brazing, a comparison was made with a base 3xxx alloy free of Sc and Zr. EBSD maps after hot deformation showed that the Al-0.08S-0.09Zr alloy exhibited more resistance towards recrystallization resistance. After the simulated high-temperature brazing at 605 °C, the base alloy suffered from abnormal grain growth, whereas the Al-0.08Sc-0.09Zr alloy exhibited an elongated recrystallized microstructure. |
| Proceedings Inclusion? |
Planned: Light Metals |