About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Vacancy Engineering in Metals and Alloys
|
| Presentation Title |
Effect of Sn microalloying and vacancies on diffusion of Zr in Aluminum |
| Author(s) |
Nicholas Richter, Janet Meier, Lawrence Allard, Christopher Fancher, Sumit Bahl, James Allen Haynes, Amit Shyam |
| On-Site Speaker (Planned) |
Amit Shyam |
| Abstract Scope |
Sn microalloying is known to facilitate nucleation and precipitation in aluminum alloys. Recently, conductor aluminum alloys have been reported with Sn microalloying that increases the number density of coherent Al3Zr precipitates and achieves a balance of mechanical and electrical properties. Hypotheses for Sn increasing nucleation rate in Al-Zr alloys will be examined in this presentation. Two possibilities will be examined, (i) Sn microalloying promoting clustering with Zr and vacancies and (ii) Sn microalloying influencing the diffusivity of Zr and Aluminum. Diffusivity of Zr in aluminum alloys will be reported with and without microalloying with Sn via quantification of coarsening kinetics of the Al3Zr precipitate. It will be demonstrated that Sn microalloying has unexpected effects on the diffusivity of Zr in aluminum. The obtained results can be rationalized on the basis of first principle calculated migration energies of vacancy-Zr-Sn complexes in aluminum. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Aluminum, Mechanical Properties, Phase Transformations |