About this Abstract |
Meeting |
2025 TMS Annual Meeting & Exhibition
|
Symposium
|
Aluminum Alloys: Development and Manufacturing
|
Presentation Title |
The Cause and Mechanism of Agglomeration of Coarse Al3Zr Particles in Al-Mg-Zr Alloys |
Author(s) |
Tao Liu, Yang Li, Siping Zhang, Huixue Jiang, Lin Lin |
On-Site Speaker (Planned) |
Tao Liu |
Abstract Scope |
Coarse Al3Zr particles agglomeration is a frequent defect in the production of Al-Mg-Zr alloy forgings. To unravel the root cause, this study employed comprehensive sampling and analysis throughout the Al-Mg-Zr production process. The intrinsic mechanism was investigated using industrial CT technology. It was found that the overflow of hydrogen bubbles during the solidification process is the key factor in Al3Zr particle agglomeration. The result using CT analysis confirmed the presence of many spherical hydrogen bubbles in the subcutaneous position of the ingot gating section. Notably, these bubbles exhibited a high concentration of Al3Zr particles adsorbed onto their surfaces. This suggests that rising hydrogen bubbles significantly capture Al3Zr particles. Upon contact, some bubbles with adsorbed Al3Zr particles either merge or rupture. As these bubbles shrink or disappear, the Al3Zr particles on their surfaces gradually coalesce towards the center, ultimately leading to the exfoliation of agglomerated Al3Zr particles back into the melt. |
Proceedings Inclusion? |
Planned: Light Metals |
Keywords |
Aluminum, Solidification, Process Technology |