About this Abstract |
Meeting |
2025 TMS Annual Meeting & Exhibition
|
Symposium
|
Aluminum Alloys: Development and Manufacturing
|
Presentation Title |
Precipitation and Its Thermal Stability in a Conventionally Non-Heat Treatable AA3xxx Aluminum Alloy |
Author(s) |
Suqin Zhu, Xiangyuan Cui, Yasuhiro Aruga, Hongwei Liu, Simon Ringer |
On-Site Speaker (Planned) |
Suqin Zhu |
Abstract Scope |
This study reports an unexpected yet strong precipitate strengthening in a conventionally non-heat treatable AA3104 (Al-Mn-Mg) aluminum alloy, demonstrating exceptional thermal stability compared to similar precipitates. Multiscale characterization techniques and first-principle simulations were applied to reveal the underlying mechanisms. The β′ (Mg9Si5) phase was the unusual primary strengthening phase, which exhibited distinctive regularly-Cu-decorated interfaces and orientation relationship with the matrix. Particularly, stacking faults and resultant domains were observed in the nanoscale β′ phase. The atomistic simulations rationalize that a minor Cu addition directly promoted these structural characteristics in the precipitates, which collectively enhanced the strengthening effect of the precipitates and thermal stability. |
Proceedings Inclusion? |
Planned: Light Metals |
Keywords |
Aluminum, Characterization, Computational Materials Science & Engineering |