| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Nanostructured Materials in Extreme Environments II
|
| Presentation Title |
Hetero-nanostructuring and Relaxation Behavior of an Al-Mg Nanostructured Alloy Examined by High-energy Synchrotron X-rays |
| Author(s) |
Megumi Kawasaki, Jae-Kyung Han, Klaus-Dieter Liss |
| On-Site Speaker (Planned) |
Megumi Kawasaki |
| Abstract Scope |
This study highlights the application of high-energy synchrotron X-rays to investigate the hetero-nanostructure formation during mechanical bonding and microstructure relaxation during heating of Al-Mg metastable alloy processed by high-pressure torsion (HPT). The formation of a homogeneous nanostructure was demonstrated with grain sizes of 30-40 nm in an Al alloy with a Mg supersaturated metastable state through a severe shear strain of γ ≈ 4000 at room temperature. Micro-beam synchrotron high-energy X-ray diffraction (HEXD) analysis displays the transition to form such hetero-nanostructure from the dissimilar metals. The supersaturated Al-Mg alloy is characterized further by in-situ micro-beam HEXD upon heating up to 850K, unraveling the recovery of the nanostructured metastable alloy. The nucleation and dissolution of intermetallic phases are apparent from the evaluation of peak profiles with temperature. The novel diffraction techniques provide a significant opportunity to understand the position- and time-sensitive and temperature-resolved microstructural evolution in nanostructure materials. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Characterization, Aluminum, Phase Transformations |