| About this Abstract |
| Meeting |
2022 TMS Annual Meeting & Exhibition
|
| Symposium
|
Cast Shop Technology
|
| Presentation Title |
NOW ON-DEMAND ONLY - The Effect of the Holding Time on the Microstructure of Gd-containing AlSi7Mg Alloys |
| Author(s) |
Özen Gürsoy, Giulio Timelli |
| On-Site Speaker (Planned) |
Özen Gürsoy |
| Abstract Scope |
Among lanthanides, Gd addition has been expected to show a good achievement in changing the microstructure of the alloys for better performance in high-temperature applications. Nevertheless, there is a lack of information about the casting practice of Gd addition in terms of holding time and fading effect. In this study, the effective holding time and the fading effect of Gd in AlSi7Mg alloy have been investigated. After minor (0.1 wt. %) and major (0.5 wt. %) Gd additions, different holding times in the range between 15 and 200 minutes were examined. The chemical composition of the molten bath was frequently verified as a function of the holding time. Thermal analysis, macro- and microstructural investigations were performed. The results indicate how 45 minutes of holding time produce eutectic Si refinement. Longer holding times promote Gd settling leading to grain coarsening and formation of larger eutectic Si flakes. |
| Proceedings Inclusion? |
Planned: Light Metals |
| Keywords |
Other, Other, Other |