About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Local Chemical Ordering and Its Impact on Mechanical Behaviors, Radiation Damage, and Corrosion
|
| Presentation Title |
Theoretical Insights Into Solute Cluster Strengthening in Mg-Zn Alloys |
| Author(s) |
Yuanren Liu, Jiaqi Dong, Kelvin Xie, Yong-Jie Hu |
| On-Site Speaker (Planned) |
Yong-Jie Hu |
| Abstract Scope |
Solute clustering has been actively recognized as an effective strengthening mechanism in Al and Mg alloys. However, the fundamental origin of solute cluster strengthening remains elusive and cannot be fully rationalized by simply extending classical solid-solution or precipitate strengthening theories. In this work, Mg–Zn alloys are employed as a model system to establish a multiscale simulation framework that elucidates the strengthening mechanism induced by solute clusters. To isolate essential physics, we focus on an oversimplified form of solute clusters, two-atom dimers, and systematically investigate their strengthening effects on basal slip by considering various cluster configurations and their crystallographic relationships with the dislocation Burgers vector. As a result, the strengthening-induced increments in critical resolved shear stress are predicted as a function of solute concentration and temperature. This study provides multiscale theoretical insights into the key structural and energetic features that control the strengthening effectiveness of Zn solute clusters. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Computational Materials Science & Engineering, Magnesium, Mechanical Properties |
