About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Ultrafine-Grained and Heterostructured Materials (UFGH) XIV
|
| Presentation Title |
Recrystallization-swifted precipitation, structural evolution, and residual stress relaxation in nanostructured Al-Cu-Li alloy |
| Author(s) |
Klaus-Dieter Liss, Naoki Takata, Wenyuan Wang, Megumi Kawasaki |
| On-Site Speaker (Planned) |
Klaus-Dieter Liss |
| Abstract Scope |
Multi-dimensional synchrotron microbeam diffraction was applied to nanostructured Al-1.1Cu-6.8Li-0.8X at.% alloy upon a heating to 830 K. A T1 precursor intermetallic as well as the T2 phase has been identified. Radial and azimuthal reciprocal space has been analyzed to determine Bragg reflections and their orientational statistics. Residual stress and texture determine the initial nanostructured solid solution. While stress relaxes first, precipitation of precursor T1 sets in before recrystallization, leading to nano-scaled plate-shaped precipitates. Inherent with recrystallization, T2 phase appears and grows by transformation from T1 and precipitation from the matrix. Eventually, T2 dissolves again, while recrystallization ends and sluggish grain growth occurs, which becomes unhindered once T2 disappears. These events mark anomalies in the curves for total lattice strain, small-angle signals, and peak widths. The morphology of reflections on the Debye-Scherrer rings allows for determining grain sizes, which have been validated by electron microscopy and diffraction. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Shaping and Forming, Characterization, |