| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Characterization of Minerals, Metals and Materials 2024: Process-Structure-Property Relations and New Technologies
|
| Presentation Title |
Novel Al-10Si-0.3Mg-0.2Fe Alloy: Enhancing Strength and Recyclability Through Thermal Treatment |
| Author(s) |
Kwangjun Euh, Young-Hee Cho |
| On-Site Speaker (Planned) |
Kwangjun Euh |
| Abstract Scope |
In the automotive aluminum die-casting parts, high strength and large elongation is required with excellent fluidity. Concurrently, recyclability (bearing Fe element) is becoming more important due to the carbon footprints. In this study, we designed a novel Al-10Si-0.3Mg-0.2Fe alloy with a little addition of zirconium for enhancing strength. Utilizing external energy treatment to the melt refined the primary Fe-containing phases. Two-step annealing (480°C+ 535°C) was adapted after the permanent mold casting and subsequently peak-aged at 190°C. The peak-aged alloy demonstrated a tensile strength of 300 MPa and an elongation of 10%, with a thermal conductivity of 177 W/mK. By the melt treatment, the shape of Fe-intermetallic phase was transformed from plate-like to Chinese-script. The Zr-rich precipitates were found in the vicinity of dendrite cell boundaries and Mg2Si-related precipitates were formed through the microstructure, contributing to the overall strength improvement. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Other, |