| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Aluminum Alloys: Development and Manufacturing
|
| Presentation Title |
Influence of Thermal-Rate Treatment on Precipitation Evolution and Mechanical Properties of Thermal-Rate Treated Al-10Si-0.35Mg Alloy |
| Author(s) |
Sang-Ik Lee, Saif Haider Kayani, Yun-Ho Lee, Je-In Lee, Kwangjun Euh, Young-Hee Cho |
| On-Site Speaker (Planned) |
Young-Hee Cho |
| Abstract Scope |
We investigate the effect of thermal-rate treatment (TRT) on age-hardening behavior and mechanical properties of Al-10Si-0.35Mg alloys with an extended range of Fe content. The alloys were prepared by direct-chill casting for fast solidification and then artificially aged (i.e. T5 heat treatment). In the as-cast condition, TRT significantly reduces the size of Fe-rich intermetallics with a uniform distribution of intermetallic particles. The precipitation sequence in both alloys during T5 heat treatment remains consistent while the TRT alloy exhibits a slower precipitation kinetics and higher density of fine precipitates. TRT alloys has higher hardness and tensile strength, while maintaining comparable elongation to NTRT alloys. Theoretical calculations of precipitation strengthening also show higher values for TRT alloys, in agreement with the experimental results. In this work, underlying mechanism of melt treatments crucial for improving precipitation behavior and mechanical properties of Al-Si-Mg alloys is further discussed. |
| Proceedings Inclusion? |
Planned: Light Metals |
| Keywords |
Aluminum, Characterization, Phase Transformations |