About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Vacancy Engineering in Metals and Alloys
|
| Presentation Title |
How Alloying Elements Shape Vacancy-Induced Solute Clustering in Binary Magnesium Alloys |
| Author(s) |
Sreenivas Raguraman, Jack Grimm, Camryn Byrum, Marc H Weber, Francelia Sanchez Escobar, Homero Reyes Pulido, Arun Devaraj, Michael Falk, Timothy P Weihs |
| On-Site Speaker (Planned) |
Sreenivas Raguraman |
| Abstract Scope |
Vacancies in metals and alloys drive solute diffusion and clustering, influencing microstructure and alloy performance. This study investigates how alloy chemistry and quenching from homogenization temperatures affect vacancy-induced solute clustering in magnesium alloys. Mg-Al, Mg-Zn, and Mg-Y alloys were homogenized and quenched from 450°C to retain excess vacancies. Vacancy concentrations were quantified using Positron Annihilation Spectroscopy (PAS), while Atom Probe Tomography (APT) mapped solute clustering behavior. Scanning Electron Microscopy (SEM) and X-ray Diffraction (XRD) provided supporting microstructural context. Molecular Dynamics (MD) simulations, combined with Transition Interface Sampling (TIS), enabled rare-event analysis of vacancy–solute interactions and clustering pathways. Results reveal pronounced clustering in Mg-Al and Mg-Zn, with minimal clustering in Mg-Y, highlighting a strong composition dependence. This is the first experimental demonstration that alloying elements can distinctly modulate vacancy-induced clustering in Mg alloys. These insights provide a framework for tailoring microstructures in structural and biomedical magnesium alloys through vacancy engineering. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Phase Transformations, Magnesium, Characterization |